NEWS.md
In plotly: Create Interactive Web Graphics via 'plotly.js'

4.10.3

ggplotly() now works better with the development version of ggplot2 (> v3.4.3). (#2301)

Closed #1947: ggplotly() now correctly handles geom_vline/geom_hline with empty data. Previously, if geom_vline/geom_hline was passed an empty data frame, it would result in an error. The plot is drawn even if no lines are found; this is the same behavior as ggplot2.
Closed #1214: Do not warn in RStudio on Windows when scattergl is used. Recent RStudio versions can render scattergl correctly.
Closed #2298: Fix fill assignment in geom_point when a single shape value was used with multiple fill and colour values mapped (@zeehio)

4.10.2

Closed #2216: Additional selectize.js options can now be passed along to highlight()'s selectize argument. (#2217)

Closed #2259: ggplotly() now provides better support for ggplot2 >v3.4.2. (#2262)

Closed #2212: ggplotly() no longer silently drops legends that are customized through ggplot2::guide_legend().
Closed #2179: save_image() no longer needs reticulate::py_run_string("import sys") in order to run without error. (#2179)
Closed #2218: highlight(selectize = TRUE) no longer yields an incorrect selectize.js result when there is a combination of crosstalk and non-crosstalk traces. (#2217)
Closed #2208: ggplotly() no longer errors given a geom_area() with 1 or less data points (error introduced by new behavior in ggplot2 v3.4.0). (#2209)
Closed #2220: ggplotly() no longer errors on stat_summary(geom = "crossbar"). (#2222)
Closed #2212: ggplotly() no longer removes legends when setting guide properties via guides(aes = guide_xxx(...)).

4.10.1

This version of the R package upgrades the version of the underlying plotly.js library from v2.5.1 to v2.11.1. This includes many bug fixes and improvements. The plotly.js release page has the full list of changes.

plotlyOutput() gains a new fill parameter. When TRUE (the default), the widget's container element is allowed to grow/shrink to fit it's parent container so long as that parent is opinionated about its height and has been marked with htmltools::bindFillRole(x, container = TRUE). (#2198)
The primary motivation for this is to allow plots to grow/shrink by default inside bslib::card_body_fill()
ggplotly() now supports the {ggalluvial} package. (#2061, thanks @moutikabdessabour)
highlight() now supports on="plotly_selecting", enabling client-side linked brushing via mouse click+drag (no mouse-up event required, as with on="plotly_selected"). (#1280)
raster2uri() supports nativeRaster objects. This enables nativeRaster support for the annotation_raster() geom (#2174, @zeehio).

ggplotly() now converts stat_ecdf() properly. (#2065)
ggplotly() now correctly handles geom_tile() with no fill aesthetic. (#2063)
ggplotly() now respects guide(aes = "none") (e.g., guide(fill = "none")) when constructing legend entries. (#2067)
Fixed an issue with translating GGally::ggcorr() via ggplotly(). (#2012)
Fixed an issue where clearing a crosstalk filter would raise an error in the JS console (#2087)
Fixed an issue where map_color() would throw an error on R 4.2 (#2131)

ggplotly() does not issue warnings with options(warnPartialMatchArgs = TRUE) any longer. (#2046, thanks @bersbersbers)
ggplotly() does not issue warnings related to use of deprecated tidyr::gather_() in internals. (#2125, thanks @simonpcouch)

4.10.0

This version of the R package upgrades the version of the underlying plotly.js library from v1.57.1 to v2.5.1. This includes many breaking changes, bug fixes, and improvements to the underlying JavaScript library. Most of the breaking changes are summarized in this announcement of the 2.0 release, but see here for the full changelog.

ggplotly() now uses the layout.legend.title (instead of layout.annotations) plotly.js API to convert guides for discrete scales. (#1961)
renderPlotly() now uses Plotly.react() (instead of Plotly.newPlot()) to redraw when layout(transition = ) is specified. This makes it possible/easier to implement a smooth transitions when renderPlotly() gets re-executed. (#2001)

Added new functions for static image exporting via the kaleido python package, namely save_image() and kaleido(). See help(save_image, package = "plotly") for installation info and example usage. (#1971)

ggplotly() now better positions axis titles for facet_wrap()/facet_grid(). (#1975)

4.9.4.1

Fixes a bug in ggplotly() with {crosstalk} and {ggplot2} v3.3.4 (#1952).

4.9.4

Duplicate highlight(selectize=T) dropdowns are no longer rendered in Shiny (#1936).
group_by.plotly() now properly retains crosstalk information across {dplyr} versions (#1920).
Adds fixes in ggplotly() for the upcoming {ggplot2} v3.3.4 release (#1952).
Fixes some issues with name and frames when both attributes are specified. (#1903 and #1618).

4.9.3

This version of the R package upgrades the version of the underlying plotly.js library from v1.52.2 to v1.57.1. This includes many bug fixes and improvements. The plotly.js release page has the full list of changes.

renderPlotly() now works well with shiny::bindCache(), meaning that plotly graphs can now be persistently cached in Shiny apps with renderPlotly(expr) %>% shiny::bindCache() (#1879).
ggplotly() now works well with the thematic package. That is, it can now correctly translate ggplot2 styling that derives from thematic. Note that, in order to use thematic's auto theming in Shiny with ggplotly(), you need shiny v1.5.0 (or higher) and htmlwidgets v1.5.2.9000 (or higher). Relatedly, if these versions are available, one may now also call getCurrentOutputInfo() inside renderPlotly() to get CSS styles of the output container (#1801 and #1802).

All HTTP requests are now retried upon failure (#1656, @jameslamb).
R linebreaks (\n) in factor labels are now translated to HTML linebreaks (<br />), too. Before, this conversion was only done for colums of type character. (#1700, @salim-b).

When R's POSIXt class is serialized to JSON, the time of day is now correctly preserved (in plotly.js expected 'yyyy-mm-dd HH:MM:SS.ssssss' format). This should fix a whole host of issues where date-times were being rounded. (#1871, @FlukeAndFeather).
ggplotly() now handles discrete axes of a facet_wrap and facet_grid correctly when there is only one category in panels > 1 (#1577 and #1720).
ggplotly() now correctly accounts for linebreaks in tick label text when computing plot margins (#1791, @trekonom).
ggplotly() now handles element_blank() and factor() labels in positional scales correctly (#1731 and #1772).
ggplotly() now handles missing y aesthetic in geom_errorbar() (#1779, @trekonom).

4.9.2.1

This is minor patch release with a few minor bug fixes and updates test expectations in anticipation of new R 4.0 defaults.

Fixes rendering issues non-HTML rmarkdown output formats, which was introduced in the 4.9.2 release (#1702).
Fixes a ggplotly() bug in axis tick translation (#1725, #1721).
plot_mapbox() now correctly defaults to a scattermapbox trace (unless z is present, then it defaults to choroplethmapbox) (#1707).
ggplotly() now correctly resolves overlapping axis tick text in coord_sf() (#1673).
A false-positive warning is no longer thrown when attempting to cast toWebGL() (#1569).

4.9.2

This version of the R package upgrades the version of the underlying plotly.js library from v1.49.4 to v1.52.2. This includes many bug fixes, improvements, as well as 2 new trace types: treemap and image. The plotly.js release page has the full list of changes.

The add_image() function was added to make it easier to create image traces via raster objects.

add_sf()/geom_sf() now correctly handle geometry columns that are named something other than "geometry" (#1659).
Specifying an english locale no longer results in error (#1686).

4.9.1

This version of the R package upgrades the version of the underlying plotly.js library from v1.46.1 to v1.49.4. The plotly.js release page has the full list of changes.

event_data() gains support for the plotly_sunburstclick event (#1648)

Fixed an issue with correctly capturing the return value of user-expressions to renderPlotly() (#1528).
Fixed a resizing issue where graphs could be incorrectly resized to their initial size in some cases (#1553).
ggplotly() now positions the x-axis in the last column of a facet_wrap() properly (#1501).
ggplotly() now handles geom_hline()/geom_vline() correctly in conjunction with coord_flip() (#1519).
event_data() now correctly relays the key attribute for statistical traces (#1610).

4.9.0

This version of the R package upgrades the version of the underlying plotly.js library from v1.42.3 to v1.46.1. The plotly.js release page has the full list of changes, but here is summary most pertainent ones for the R package:
New trace types: sunburst, waterfall, isosurface.
New hovertemplate attribute allows for finer-tuned control over tooltip text. See here for an example.
Providing a string to title is now deprecated (but still works). Instead, use title = list(text = "title"). This change was made to support a new title placement API (e.g., title = list(text = "title", xanchor = "left")). Note that these changes are relevant for layout.title as well as layout.xaxis.title/layout.yaxis.title/etc.

Several new features and improvements related to accessing plotly.js events in shiny (learn more about them in this RStudio webinar):
- The event argument of the event_data() function now supports the following events: plotly_selecting, plotly_brushed, plotly_brushing, plotly_restyle, plotly_legendclick, plotly_legenddoubleclick, plotly_clickannotation, plotly_afterplot, plotly_doubleclick, plotly_deselect, plotly_unhover. For examples, see plotly_example("shiny", "event_data"), plotly_example("shiny", "event_data_legends"), and plotly_example("shiny", "event_data_annotation"),
- New event_register() and event_unregister() functions for declaring which events to transmit over the wire (i.e., from the browser to the shiny server). Events that are likely to have large overhead are not registered by default, so you'll need to register these: plotly_selecting, plotly_unhover, plotly_restyle, plotly_legendclick, and plotly_legenddoubleclick.
- A new priority argument. By setting priority='event', the event is treated like a true event: any reactive expression using the event becomes invalidated (regardless of whether the input values has changed). For an example, see plotly_example("shiny", "event_priority").
- The event_data() function now relays the (official plotly.js) customdata attribute in similar fashion to (unofficial) key attribute (#1423). Run plotly_example("shiny", "event_data") for an example.
- event_data("plotly_selected") is no longer too eager to clear. That is, it is no longer set to NULL when clicking on a plot after triggering the "plotly_selected" event (#1121) (#1122).
Several new features and improvements for exporting static graphs with the orca command-line utility:
- The orca() function now supports conversion of much larger figures (#1322) and works without a mapbox api token (#1314).
- The orca_serve() function was added for efficient exporting of many plotly graphs. For examples, see help(orca_serve).
- The orca() function gains new arguments more_args and ... for finer control over the underlying system commands.
ggplotly() now respects horizontal alignment of ggplot2 titles (e.g., ggplotly(qplot(1:10) + ggtitle("A title") + theme(plot.title = element_text(hjust = 1)))).
plotly objects can now be serialized and unserialized in different environments (i.e., you can now use saveRDS() to save an object as an rds file and restore it on another machine with readRDS()). Note this object is dynamically linked to JavaScript libraries, so one should take care to use consistent versions of plotly when serializing and unserializing (#1376).
The style() function now supports "partial updates" (i.e. modification of a particular property of an object, rather than the entire object). For example, notice how the first plot retains the original marker shape (a square): p <- plot_ly(x = 1:10, y = 1:10, symbol = I(15)); subplot(style(p, marker.color = "red"), style(p, marker = list(color = "red"))) (#1342).
The method argument of plotlyProxyInvoke() gains support for a "reconfig" method. This makes it possible to modify just the configuration of a plot in a shiny app. For an example use, see plotly_example("shiny", "event_data_annotation").
The plotly_example() function will now attempt to open the source file(s) used to run the example. Set edit = FALSE to prevent the source file(s) from opening.
An informative warning is now thrown if invalid argument names are supplied to config().

If stroke is specified, span now defaults to I(1). This results in a slightly narrower default span for some trace types (e.g., box, contour), but it also ensures the stroke is always visible when it's relevant (e.g. plot_ly(x = 1:10, y = 1:10, stroke = I("black"))), making for a more consistent overall default (#1507).
The 'collaborate' button no longer appears in the modebar, and is longer supported, so the config() function no longer has a collaborate argument.
The cloud argument is now deprecated and will be removed in a future version. Use showSendToCloud instead.
ggplotly() now translates title information to layout.title.text (instead of layout.title) and layout.title.font (instead of layout.titlefont)

subplot() now works much better with annotations, images, and shapes:
When xref/yref references an x/y axis these references are bumped accordingly (#1181).
When xref/yref references paper coordinates, these coordinates are updated accordingly (#1332).
subplot() now repositions shapes with fixed height/width (i.e., xsizemode/ysizemode of "pixel") correctly (#1494).
The colorscale attribute now correctly handles a wider range of input values (#1432, #1485)
The colorscale generated via the color argument in plot_ly() now uses an evenly spaced grid of values instead of quantiles (#1308).
When using shinytest to test a shiny that contains plotly graph, false positive differences are no longer reported (rstudio/shinytest#174).
When the size argument maps to marker.size, it now converts to an array of appropriate length (#1479).
The color and stroke arguments now work as expected for trace types with fillcolor but no fill attribute (e.g. box traces) (#1292).
Information emitted by in event_data() for heatmaps with atomic vectors for x/y/z is now correct (#1141).
Fixed issue where dplyr groups caused a problem in the ordering of data arrays passed to marker objects (#1351).
In some cases, a ggplotly() colorbar would cause issues with hover behavior, which is now fixed (#1381).
An articial marker no longer appears when clearing a crosstalk selection of a plot with a colorbar (#1406).
Clearing a highlight event via crosstalk no longer deletes all the traces added since initial draw (#1436).
Recursive attribute validation is now only performed on recursive objects (#1315).
The text attribute is no longer collapsed to a string when hoveron='fills+points' (#1448).
layout.[x-y]axis.domain is no longer supplied a default when layout.grid is specified (#1427).
When uploading charts to a plot.ly account via api_create(), layout attributes are no longer incorrectly src-ified, which was causing inconsistencies in local/remote rendering of ggplotly() charts (#1197).

4.8.0

plotly.js and `plot_ly()` specific improvements

Upgraded to plotly.js v1.39.2. A huge amount of features and improvements have been made since v1.29.2 (i.e., the version included in the last CRAN release of the R package - v4.7.1). Highlights include a complete re-write of scattergl to make it nearly feature complete with scatter, localization of text rendering (i.e., international translations), and six new trace types (cone, scatterpolar, scatterpolargl, splom, table, & violin)! See here for a complete list of plotly.js-specific improvements.
Support for sf (simple feature) data structures was added to plot_ly(), plot_mapbox(), and plot_geo() (via the new add_sf() function). See this blog post for an overview.
Better control over the stroke (i.e., outline) appearance of various filled graphical marks via the new "special arguments" (stroke, strokes, alpha_stroke, span, and spans). For an overview, see the sf blog post linked to in the bullet point above and the new package demos (list all demos with demo(package = "plotly")).

`ggplotly()` specific improvements

ggplotly() now supports conversion of ggplot2's geom_sf().
One may now inform ggplotly() about the relevant shiny output size via session$clientData. This ensures ggplotly() sizing is closer to ggplot2 sizing, even on window resize. For an example, run plotly_example("shiny", "ggplotly_sizing").

LaTeX rendering via MathJax is now supported and the new TeX() function may be used to flag a character vector as LaTeX (#375). Use the new mathjax argument in config() to specify either external (mathjax="cdn") or local (mathjax="local") MathJaX. If "cdn", mathjax is loaded externally (meaning an internet connection is needed for TeX rendering). If "local", the PLOTLY_MATHJAX_PATH environment variable must be set to the location (a local file path) of MathJax. IMPORTANT: plotly uses SVG-based mathjax rendering which doesn't play nicely with HTML-based rendering (e.g., rmarkdown documents and shiny apps). To leverage both types of rendering, you must <iframe> your plotly graph(s) into the larger document (see here for an rmarkdown example and here for a shiny example).
The selection (i.e., linked-brushing) mode can now switch from 'transient' to 'persistent' by holding the 'shift' key. It's still possible to force persistent selection by setting persistent = TRUE in highlight(), but persistent = FALSE (the default) is now recommended since it allows one to switch between persistent/transient selection in the browser, rather than at the command line.
The highlight() function gains a debounce argument for throttling the rate at which on events may be fired. This is mainly useful for improving user experience when highlight(on = "plotly_hover") and mousing over relevant markers at a rapid rate (#1277)
The new partial_bundle() function makes it easy to leverage partial bundles of plotly.js for reduced file sizes and faster render times.
The config() function gains a locale argument for easily changing localization defaults (#1270). This makes it possible localize date axes, and in some cases, modebar buttons (#1270).
The plot_geo() function gains a offline argument for rendering "scattergeo" traces with or without an internet connection (#356). Leveraging this argument requires the new plotlyGeoAssets package.
Support for async rendering of inside shiny apps using the promises package (#1209). For an example, run plotly_example("shiny", "async").
Instead of an error, ggplotly(NULL, "message") and plotly_build(NULL, "message") now returns htmltools::div("message"), making it easier to relay messages in shiny when data isn't yet ready to plot (#1116).
The animation_button() function gains a label argument, making it easier to control the label of an animation button generated through the frame API (#1205).
The new highlight_key() function provides a wrapper around crosstalk::SharedData$new(), making it easier to teach others how to leverage SharedData objects with plotly and crosstalk.

`plot_ly()` specific changes

The name attribute is now a "special plot_ly() argument" and behaves similar to split (it ensures a different trace for every unique value supplied). Although this leads to a breaking change (name was previously appended to an automatically generated trace name), it leads to a more flexible and transparent API. Those that wish to have the old behavior back should provide relevant mappings to the name attributes (e.g. plot_ly(mtcars, x = ~wt, y = ~mpg, color = ~factor(vs), name = "a") should become plot_ly(mtcars, x = ~wt, y = ~mpg, color = ~factor(vs), name = ~paste(vs, "\na")))
The color argument now maps to fillcolor, making it much easier to use polygon fills to encode data values (e.g., choropleth maps). For backwards-compatibilty reasons, when color maps to fillcolor, alpha defaults to 0.5 (instead of 1). For an example, plot_mapbox(mn_res, color = ~INDRESNAME) or plot_mapbox(mn_res, split = ~INDRESNAME, color = ~AREA, showlegend = FALSE, stroke = I("black")).
The color argument no longer automatically add "markers" to the mode attribute for scatter/scattergl trace types. Those who wish to have the old behavior back, should add "markers" to the mode explicity (e.g., change plot_ly(economics, x = ~pce, y = ~pop, color = ~as.numeric(date), mode = "lines") to plot_ly(economics, x = ~pce, y = ~pop, color = ~as.numeric(date), mode = "lines+markers")).
The size argument now informs a default error_[x/y].width (and span informs error_[x/y].thickness). Note you can override the default by specifying directly (e.g. plot_ly(x = 1:10, y = 1:10, size = I(10), error_x = list(value = 5, width = 0))).
layout.showlegend now defaults to TRUE for a single pie trace. This is a more sensible default and matches pure plotly.js behavior.

All axis objects now default to automargin = TRUE. The majority of the time this should make axis labels more readable, but may have un-intended consequences in some rare cases (#1252).
The elementId field is no longer populated, which fixes the "Ignoring explicitly provided widget ID" warning in shiny applications (#985).

`ggplotly()` specific fixes

The default height/width that ggplotly() assumes is now more consistently correct in various context, but it also now requires access to one of the following devices: Cairo::Cairo(), png(), or jpg().
In RStudio, ggplotly() was ignoring a specified height/width (#1190).
ggplotly() now uses fixed heights for facet strips meaning that their height is still correct after a window resize (#1265).

`plot_ly()` specific fixes

The limits argument of colorbar() wasn't being applied to line.color/line.cmin/line.cmax (#1236).
The legendgroup can now properly map data values (#1148).

Marker sizes (i.e., marker.size) are now always based on the area when marker.sizemode='area' (which is the default sizemode when using the size argument). Previously, traces with one just one value supplied to marker.size were being sized by their diameter (#1133).
Bug fix for linking views with crosstalk where the source of the selection is an aggregated trace (#1218).
Resizing behavior, after updating height/width via shiny reactive values, is now correct (#1068).
Fixed algorithm for coercing the proposed layout to the plot schema (#1156).
add_*() no longer inherits crosstalk::SharedData key information when inherit = FALSE (#1242).

4.7.1

It is now possible to modify (i.e., update without a full redraw) plotly graphs inside of a shiny app via the new plotlyProxy() and plotlyProxyInvoke() functions. For examples, see plotly_example("shiny", "proxy_relayout") and plotly_example("shiny", "proxy_mapbox"). Closes #580.
Added a new plotly_example() function to make it easier to run shiny/rmarkdown examples included with the package under the inst/examples directory.
The schema() function now returns the plot schema (rather just printing it), making it easier to acquire/use values from the official plot schema. See help(schema) for an example. Fixes #1038.

Upgraded to plotly.js v1.29.2 -- https://github.com/plotly/plotly.js/releases/tag/v1.29.2

The default sizing in ggplotly() is no longer fixed to the device size inside RStudio. Fixes #1033.
Removed use of ArrayBuffer.isView(), which should fix rendering issues on plaforms that don't have a typed array polyfill (e.g., RStudio on Windows). Fixes #1055.
event_data("plotly_relayout") no longer fires NULL for any event. Fixes #1039.
Fixed a bug when using color with scattermapbox/scattergeo. Fixes #1038.
Fixed a highlighting bug when brushing multiple points with marker.color as an array. Fixes #1084.

4.7.0

Added support for fixed coordinates (i.e., the aspect ratio component of coord_equal(), coord_fixed(), coord_map(), coord_quickmap()).
Added support for geom_sf() and coord_sf().
The (previously internal) group2NA() function is now exported and its performance has been greatly improved thanks to the new data.table dependency. Essentially any geom conversion that reduces to a polygon/path should see speed improvements. Similarly, any plot_ly() graph that use group_by() in conjunction with add_lines(), add_paths(), add_segments(), etc will also see improvements, especially when there is a large number of groups. For details on the speed improvements, see #1022 and #996 (thanks @msummersgill).
The api_create() function gains a new fileopt argument, which is inspired from the fileopt argument in the (deprecated) plotly_POST() function (fixes #976). It currently supports to values: "new" and "overwrite". The default, "overwrite", will overwrite existing file(s) with a matching filename.
The filename argument in api_create() now accepts a character vector of length 2, the first string is used to name the plot, and the second is used to name the grid (i.e., data behind the plot).

Upgraded to plotly.js v1.27.1 -- https://github.com/plotly/plotly.js/releases/tag/v1.27.1
The traces argument in the style() function now defaults to NULL (instead of 1). Meaning that, by default, supplied attributes now modify every trace (instead of the first one).

Fixes numerous problems with coord_flip() (fixes #1012).
The typed array polyfill is now included before the plotly.js bundle, which should fix some rendering issues in some browsers, including RStudio (fixes #1010).
When creating private plots (via api_create()), both the plot and the data behind the plot are private (fixes #976).
Creating a plot with multiple traces (or frames) via (via api_create()) no longer creates multiple grids (fixes #1004).
The api_create() function should now create grid references for all data array attributes (fixes #1014).
ggplotly() no longer opens an (off-screen) graphics device in RStudio for sizing. It will now correctly use the size of the viewer panel when querying the size of the graphics device.
Margins are no longer always set to NULL for pie charts (fixes #1002)
Fixed bug when highlight multiple 'simple key' traces (fixes #974).

4.6.0

Added a significant amount of support for "multiple linked views". For some relatively basic examples, see the demos (the ones prefixed with "highlight" are most relevant) -- demo(package = "plotly"). For a more comprehensive overview, see https://plotly-r.com/client-side-linking.html. For some more complex examples, see https://pedestrians.cpsievert.me/
Added the highlight() function for configuring selection modes/sequences/options.
Added support for animation. For some relatively basic examples, see the examples section of help(animation). For a more thorough overview, see https://plotly-r.com/animating-views.html
Added a frame argument to plot_ly() for creating animations. Also added the animation_opts(), animation_slider(), and animation_button() functions for configuring animation defaults.
Added a new interface to v2 of the REST API. This new interface makes the plotly_POST() and get_figure() functions obsolete (use api_create() and api_download_plot() instead), and thus, are now deprecated, but remain around for backwards-compatibility. For more details, see help(api).
Added support for conversion of more ggplot2 geoms via ggplotly(): GeomCol, GeomRug, GeomCrossbar, GeomQuantile, GeomSpoke, GeomDotplot, GeomRasterAnn (i.e., annotation_raster()), and GeomAnnotationMap (i.e., annotation_map()).
Added a new function raster2uri() which makes it easier to embed raster objects as images via data URIs. For examples, see help(raster2uri).
ggplotly() gains a new argument, dynamicTicks, which allows axis ticks to update upon zoom/pan interactions (fixes #485).
Sensible sizing and positioning defaults are now provided for subplots multiple colorbars.
R linebreaks are translated to HTML linebreaks (i.e., '\n' translates to '') (fixes #851).
Added a plot_dendro() function for a quick and dirty interactive dendrogram with support for hierarchial selection. For more, see -- https://plotly-r.com/client-side-linking.html#fig:dendro
The export() function gains a selenium argument for rendering/exporting WebGL plots and exporting to 'svg'/'webp' file formats (via the plotly.js function Plotly.downloadImage()).
Better type checking of trace attributes will now automatically reduce a single-valued vector to a constant (when appropriate). This is particularly useful for anchoring multiple traces to a single legend entry via legendgroup (see #675, #817, #826).
The plotlyOutput() function gains a inline argument which makes it easier to place multiple plots in the same row (in a shiny application).

Upgraded to plotly.js v1.26.1 -- https://github.com/plotly/plotly.js/releases/tag/v1.26.1
ggplotly() now applies format() to automatically generated hoverinfo. This will allow for finer control over the text displayed (for instance, options(digits = 4) can now be used to choose the number of significant digits used). See #834 for an example.
HTMLwidgets.renderValue() should now avoid creating too many active WebGL contexts (thanks @AleksandrIanevski).
A TypedArray polyfill is now included by default, and the function remove_typedarray_polyfill() was added to make it easy to remove it. Fixes #824, #717, #825.
If no graphics device is already open, ggplotly() now tries to open/close a Cairo graphics device, then a bitmap (png/jpeg) device. If neither is available, it errors. This helps to ensure that a screen device is never opened by ggplotly() (which fixes #829). Furthermore, if width/height is not specified and no graphics device is currently open, a default of 640/480 is used for width/height of the device.

Placement of bars (in all cases, even when representing a negative count) should now be correct (applies to geom_bar(), geom_histogram(), geom_col()). Fixes #560, #874, #901, #831.
Fix for hoverinfo displaying the heights of bars in the translation geom_bar() via ggplotly(). Fixes #557 and #662.
embed_notebook() now works in nteract notebooks (see #768).
Axis categories are no longer reordered for matrices (see #863).
Fix for hoverinfo displaying values after scale transformations (in ggplotly()). Fixes #804.
Font faces for axis titles are now translated (in ggplotly()). Fixes #861.

4.5.6

Added support for the timezone argument in ggplot2's scale_datetime(). Fixes (#743, thanks @earowang).

Now requires a version of ggplot2 higher than 2.1.0 because the new ggproto faceting infrastructure introduced breaking changes.
A book icon is added to the mode bar, by default, which links to the plotly book. If you want to remove this icon from a plot p, do config(p, modeBarButtonsToRemove = "Collaborate")
Specifying height/width in layout() is now deprecated. Specify in ggplotly() or plot_ly().
The ggplotly() function now preserves all information about the layer mapping. This makes it possible to access input/output data from any layer.

HTMLwidget.resize() used to ignore specified layout.width/layout.height.
When height/width are specified in ggplotly(), relative sizes are now translated correctly. Fixes #489 and #510.
More careful handling of font when expanding annotation arrays. Fixes #738.
Ignore data arrays of non-tidy traces. Fixes #737.
When using ggplotly() on a plot with geom_line and group aesthetic wrong tooltip information was shown. Fixes #774.

4.5.5 -- 28 September 2016

histogram2d/histogram2dcontour traces now respect the colors argument.

Don't traceify by non-existant levels, fixes #735.

4.5.4 -- 27 September 2016

Only insert missing values to differentiate groups when it's relevant.

4.5.3 -- 27 September 2016

The colorbar() function gains a new limits arguments for controlling the colorscale limits.

The z is now required in add_heatmap(). If you want a z to be computed, use add_histogram().

4.5.2 -- 23 September 2016

The new argument, split, replaces the old functionality of the now deprecated group argument by creating one trace per value.

Passing plots to subplot() without a specified color (once again) match the coloring defaults supplied by plotly.js (see #724).

4.5.1 -- 23 September 2016

A tibble with a list-column of plotly objects can now be input directly into subplot()

The colorbar() function now works on colorbars generated via z mapping.

4.5.0 -- 22 September 2016

Added the plot_mapbox() and plot_geo() functions, which make it easier to work with the "scattermapbox", "scattergeo", and "choropleth" trace types. See the maps chapter of the plotly book for some examples -- https://plotly-r.com/maps.html
subplot() now accepts, and correctly scales mapbox objects.
Added the add_mesh3d() and add_pie() functions as wrappers around the "mesh3d", and "pie" trace types.

The add_scattergeo() and add_choropleth() functions have been deprecated in favor of plot_geo().
The add_area(...) function changed it's meaning from add_lines(..., fill = 'tozeroy') to a wrapper around the area trace https://plotly.com/r/reference/#area. This is more consistent with the naming conventions already in place for other add_() functions.
add_ribbons() now shows points (instead of fill) on hover.

4.4.5 -- 19 September 2016

Added a rangeslider() function to make it easier to add a range slider to the x-axis.
Added a colorbar() function to make it easier to modify an automatically generated colorbar.

Bug fix for data arranging (introduced in 4.4.2).
If the same (discrete) variable is mapped to two different aesthetics, redundant text is no longer generated in the legend entries (e.g., plot_ly(mpg, x = ~cty, y = ~hwy, symbol = ~factor(cyl), color = ~factor(cyl)))

4.4.4 -- 15 September 2016

Added inherit argument for all add_() functions to avoid inheriting attributes from plot_ly().
Added the add_fun() function to add layers to a plot without modifying the original data associated with a plotly object.
Added the add_annotations() function to make it easier to add annotations.
Added the layerData argument to ggplotly() to make it possible to retrieve the data from a particular ggplot2 layer.

4.4.3 -- 15 September 2016

Downgrade to plotly.js v1.16.3 (which is proven to be a stable release and avoids #717) -- https://github.com/plotly/plotly.js/releases/tag/v1.17.2

4.4.2 -- 14 September 2016

Arrange data by trace index before computing groups, fixes #716.

4.4.1 -- 14 September 2016

Restrict to atomic vectors when gathering data for training; otherwise, formulas referencing variables that don't exist in the data, but reference a function can cause problems.

4.4.0 -- 13 September 2016

To enhance visibility of small markers, marker.line.color is now transparent by default.
Upgraded to plotly.js v1.17.2 -- https://github.com/plotly/plotly.js/releases/tag/v1.17.2

It is now possible (again) to set/change attributes of autogenerated marker.colorbar.
The add_choropleth() previously wasn't relaying the z attribute.
Factors were being treated as characters in add_segments() (resulting in incorrect axis category order).
No more error in plot_ly() when the number of traces is a multiple of ten.

4.3.7 -- 11 September 2016

event_data() now works inside shiny modules (#659). For an example, see https://github.com/plotly/plotly.R/tree/master/inst/examples/shiny/event_data_modules

4.3.6 -- 9 September 2016

Upgraded to plotly.js v1.17.0 -- https://github.com/plotly/plotly.js/releases/tag/v1.17.0

Fix for error handling in add_bars().
More careful logic for inferring data variables. Fixes #712

4.3.5 -- 5 September 2016

The internal as_widget() function was exported to make it easier to convert a list (adhering to the plotly spec) to a plotly htmlwidget object. This should only be needed when "manually" editing the underlying list object.
Warnings about missing attributes now supply information about the relevant trace.

vignettes were removed and that documentation will now be hosted at https://plotly.com/r/

Get event_data() working with subplots. Fixes #663

4.3.4 -- 31 August 2016

Expressions yielding a ggplot2 object can now, once again, be provided to plotlyOutput(). In order to make this possible, ggplotly() now has a method for plotly objects (the identity function), and ggplotly() called on any expression provided to plotlyOutput().

4.3.3 -- 29 August 2016

Bug fix for translation of ggplot2's geom_text().

4.3.2 -- 26 August 2016

The function last_plot() can now be used to retrieve the most recently printed plotly graph. Thanks to this new feature, when plotly_POST() is called with no plotly object supplied, the most recently printed plotly graph is sent to the users plotly account.

4.3.1 -- 23 August 2016

Upgraded to plotly.js v1.16.3 -- https://github.com/plotly/plotly.js/releases/tag/v1.16.3

4.3.0 -- 22 August 2016

The colors/symbols/linetypes arguments now accept named character vectors. The names specify the domain (i.e., data values) and the values specify the range (i.e., visual encodings). This is mainly useful to ensure a particular (discrete) data value is mapped to a particular visual attribute (yes, this is similar, in spirit, to ggplot2's scale_*_manual()).

Symbol and linetype palette defaults are now determined by scales::shape_pal() and scales::linetype_pal().
viridis is the default color scale for ordered factors.
When mapping a character string to color/symbol/linetype, domain values are sorted alphabetically before scales are applied. Also, when mapping a factor to color/symbol/linetype, domain values are sorted according to their factor levels before scales are applied. This leads to more consistent (categorical axis ordering behaves similarly) and predictable (compared to having values sorted in the order in which they appear) behavior.

4.2.1 -- 22 August 2016

alpha is now applied when color isn't specified (fixes #658).

4.2.0 -- 11 August 2016

plot_ly() now orders the categories of a discrete x/y axis according the level ordering (if a factor) or alphabetical order (if a character string). Fixes #578.

4.1.1 -- 8 August 2016

Upgraded to plotly.js v1.16.1 -- https://github.com/plotly/plotly.js/releases/tag/v1.16.1

4.1.0 -- 27 June 2016

ggplotly() gains a new originalData argument which allows one to attach either the original (global) data, or a "scaled"/"trained" version of the data used by ggplot2 to draw the graph (for a quick example, ggplotly(qplot(1:10), originalData = FALSE) %>% plotly_data()).
Hoverinfo is now shown for fill, instead of points, for several geoms (geom_polygon()/geom_hex()/geom_rect()/geom_map()).
If stat_identity() is used, group domain values are preserved and displayed in hoverinfo.
New functions hide_guides()/hide_legend() were added (these work similarly to the existing hide_colorbar()) to simply the hiding of guides (i.e., legends/colorbars).

Legend titles (annotations) are no longer generated when no legend is displayed (#635, #607)
Hoverinfo is no longer displayed if no tooltip variables are present in a layer (#563).
Facets with 10 or more columns/rows should now render correctly (#640).
x-axis anchors in facet_wrap() should now be correct.

Upgraded to plotly.js v1.15.0 -- https://github.com/plotly/plotly.js/releases/tag/v1.15.0

4.0.2 -- 25 June 2016

Bug fix for formulas evaluating to a logical vector (#650)

4.0.1 -- 14 June 2016

Duplicated values of positional attributes are no longer removed (bug was introduced in v4.0.0).

Upgraded to plotly.js v1.14.2 -- https://github.com/plotly/plotly.js/releases/tag/v1.14.2

4.0.0 -- 13 June 2016

Formulas (instead of plain expressions) are now required when using variable mappings. For example, plot_ly(mtcars, x = wt, y = mpg, color = vs) should now be plot_ly(mtcars, x = ~wt, y = ~mpg, color = ~vs). This is a major breaking change, but it is necessary to ensure that evaluation is correct in all contexts (as a result, evaluate argument is now deprecated as it is no longer needed). It also has the benefit of being easier to program with (i.e., writing your own custom functions that wrap plot_ly()) since it preserves referential transparency. For more details, see the lazyeval vignette
The data structure used to represent plotly objects is now an htmlwidget object (instead of a data frame with a special attribute tracking visual mappings). As a result, the as.widget() function has deprecated, and serialization/memory leak problems are no longer an issue. This change also implies that arbitrary data manipulation functions can no longer be intermingled inside a plot pipeline, but plotly methods for dplyr's data manipulation verbs are now provided (see ?plotly_data for examples).
The group variable mapping no longer create multiple traces, but instead defines "gaps" within a trace (fixes #418, #381, #577). Groupings should be declared via the new group_by() function (see help(plotly_data) for examples) instead of the group argument (which is now deprecated).
plot_ly() now initializes a plotly object (i.e., won't add a scatter trace by default), meaning that something like plot_ly(x = 1:10, y = 1:10) %>% add_trace(y = 10:1) creates one trace, instead of two. That being said, if you manually specify a trace type in plot_ly(), it will add a layer with that trace type (e.g. plot_ly(x = 1:10, y = 1:10, type = "scatter") %>% add_trace(y = 10:1) draws two scatter traces). If no trace type is provided, a sensible type is inferred from the supplied data, and automatically added (i.e., plot_ly(x = rnorm(100)) now creates a histogram).
The inherit argument is deprecated. Any arguments/attributes specified in plot_ly() will automatically be passed along to additional traces added via add_trace() (or any of it's add_*() siblings).
Aesthetic scaling (e.g., color, symbol, size) is applied at the plot-level, instead of the trace level.
Size is no longer automatically included in hovertext (closes #549).

Added linetype/linetypes arguments for mapping discrete variables to line types (works very much like the symbol/symbols).
Scaling for aesthetics can be avoided via I() (closes #428). This is mainly useful for changing default appearance (e.g. plot_ly(x = 1:10, y = 1:10, color = I("red"))).
Symbols and linetypes now recognize pch and lty values (e.g. plot_ly(x = 1:25, y = 1:25, symbol = I(0:24)))
A new alpha argument controls the alpha transparency of color (e.g. plot_ly(x = 1:10, y = 1:10, color = I("red"), alpha = 0.1)).
Added a sizes argument for controlling the range of marker size scaling.
New add_polygons()/add_ribbons()/add_area()/add_segments()/add_lines()/add_markers()/add_paths()/add_text() functions provide a shorthand for common special cases of add_trace().
New toWebGL() function for easy conversion from SVG to WebGL.
New export() function makes it easy to save plots as png/jpeg/pdf (fixes #311).
Misspecified trace/layout attributes produce a warning.
New plotly_data() function for returning/inspecting data frame(s) associated with a plotly object.
New plotly_json() function for inspecting the data sent to plotly.js (as an R list or JSON).
layout() is now a generic function and uses method dispatch to avoid conflicts with graphics::layout() (fixes #464).

Upgraded to plotly.js v1.14.1 -- https://github.com/plotly/plotly.js/releases/tag/v1.14.1

3.6.5 -- 10 June 2016

IMPROVEMENT:

Multiple rows of facet strips will now be separated by (i.e., line breaks) instead of ,. See #593.

3.6.4 -- 31 May 2016

BUG FIX:

embed_notebook() will no longer use a '.embed' extension in the iframe src attribute. See #613.

3.6.3 -- 24 May 2016

CHANGES:

Provided a better way of reexporting magrittr::%>%. See #597.

3.6.2 -- 24 May 2016

CHANGES:

Removed unnecessary plyr dependency.

3.6.1 -- 23 May 2016

BUG FIX:

Add a default method for plotly_build. Fixes #592.

3.6.0 -- 16 May 2016

NEW FEATURES & CHANGES:

Many improvements to the subplot() function:
ggplot2 objects are now officially supported (#520).
Several new arguments allow one to synchronize x/y axes (#298), height/width (#376), hide/show x/y axis titles.
A list of plots can now be passed to the first argument.
A new vignette with examples and more explanation can be accessed via vignette("subplot").
ggplotly() is now a generic function with a method for ggmatrix objects.
plotly_build() is now a generic function.

BUG FIX:

Column facet strips will no longer be drawn when there is only one column.

3.5.7 -- 13 May 2016

CHANGES:

Better defaults for defaultWidth/defaultHeight in the htmlwidget's sizing policy.

BUG FIX:

Pass knitr options to the named argument options. Fixes #582.

3.5.6 -- 12 May 2016

BUG FIX:

Use .embed suffix in iframe src attribute. Fixes #581.

3.5.5 -- 5 May 2016

CHANGES:

ggplotly() will now use plotly's layout.axisid.title (instead of layout.annotations) for axis titles on non-faceted plots. This will make for a better title placement experience (see #510).

BUG FIX:

Space for interior facet_wrap() strips are now accounted for.

3.5.4 -- 5 May 2016

BUG FIX:

gg2list() now returns an object of class "plotly_built" instead of "plotly" to ensure a sensible print method is invoked.

3.5.3 -- 3 May 2016

CHANGES:

Upgrade to plotlyjs v1.10.1 -- https://github.com/plotly/plotly.js/releases/tag/v1.10.1

3.5.2 -- 2 May 2016

BUG FIX:

Added missing key properties in ggplotly() converter so selections can be accessible via event_data().

3.5.1 -- 26 Apr 2016

CHANGES:

Upgrade to plotlyjs v1.10.0 -- https://github.com/plotly/plotly.js/releases/tag/v1.10.0

Distinguish between "built" (plotly_built) and "non-built" (plotly_hash) plotly objects. See #562

3.5.0 -- 19 Apr 2016

NEW FEATURES:

The toRGB() function will now respect alpha channels in hex color codes and can recursively apply alpha.

CHANGES:

The toRGB() function will always output color codes with an alpha channel (e.g. toRGB('black') is now 'rgba(0,0,0,1)' instead of 'rgb(0,0,0)')

3.4.15 -- 18 Apr 2016

BUGFIX:

The alpha in geom_smooth was incorrectly inheriting from other layers. See #551.

3.4.14 -- 15 Apr 2016

CHANGES:

Upgrade to plotlyjs v1.9.0 -- https://github.com/plotly/plotly.js/releases/tag/v1.9.0

3.4.13 -- 6 Apr 2016

BUGFIX:

In some cases, marker color was inheriting from the marker line color when it shouldn't have. See ##537.

3.4.12 -- 5 Apr 2016

CHANGES:

Upgrade to plotlyjs v1.8.0 -- https://github.com/plotly/plotly.js/releases/tag/v1.8.0

3.4.11 -- 2 Apr 2016

BUGFIX:

Fix bug when altering modebar button defaults

3.4.10 -- 1 Apr 2016

BUGFIX:

Fix a geom_errorbar bug introduced in 3.4.9. See #513.

3.4.9 -- 25 Mar 2016

BUGFIX:

Upgrade to plotlyjs 1.7.0. Fixes #513

3.4.8 -- 23 Mar 2016

BUGFIX:

Safeguard against null fields in selections. See #530.

3.4.7 -- 19 Mar 2016

BUGFIX:

Added custom CSS which allows plotly to work nicely in ioslides.

3.4.6 -- 17 Mar 2016

NEW FEATURES:

The 'plotly_relayout' event is now accessible via the event_data() function.

Fixed #514.

3.4.5 -- 17 Mar 2016

BUGFIX:

Fixed #514.

3.4.4 -- 17 Mar 2016

BUGFIX:

Show discrete positional values in tooltip (see #515); better GeomTile conversion; pass plot object into layers2traces.

3.4.3 -- 14 Mar 2016

BUGFIX:

Custom facet labeller functions will now translate correctly. See #507.

3.4.2 -- 14 Mar 2016

BUGFIX:

Automatic resizing will now occur only when layout.autosize is true (the default). See #403.

3.4.1 -- 13 Mar 2016

BUGFIX:

Legend titles are now supported.

3.4.0 -- 12 Mar 2016

NEW FEATURES:

geom_map() and geom_hex() are now supported.

CHANGES:

The default value of the fileopt argument was changed from "new" to "overwrite".

BUGFIX:

Made a number of bugfixes/improvements to hoverinfo & conversion of geom_tile()/geom_point().

3.3.1 -- 10 Mar 2016

CHANGES:

Changed the mapping argument name to tooltip (which seems like a better name).

BUGFIX:

Redundant legend entries are no longer shown.

3.2.1 -- 10 Mar 2016

BUGFIX:

Proper formatting for date tooltips.

3.2.0 -- 10 Mar 2016

CHANGES:

Legend titles no longer appear in legend entries.
Tooltips now reflect aesthetic mappings. This makes it easier to decode data values from a given visual marking.

NEW FEATURES:

geom_violin() is now supported.
ggplotly() gains a mapping argument to control the set of aesthetics to appears in the tooltip as well as their order.

3.1.0 -- 8 Mar 2016

CHANGES:

The "hidden" sharing option in plotly_POST() was renamed to "secret".
The default value in the scale argument in plotly_IMAGE() is now 1.

3.0.0 -- 8 Mar 2016

NEW FEATURES:

ggplotly() is now about 20x faster (it avoids calling ggplot_build() 20+ times). In some cases, it might be even faster since a lot of other redundant computation is avoided.

CHANGES:

Instead of (trying to) translate both major and minor grid lines, we now translate only major grid lines. This generally produces a result closer to the actual ggplot2 result since ggplot2 doesn't draw ticks on minor grid lines.

BUG FIXES:

ggplotly() now supports most of scale_()/theme()/guides(). As a result, this fixes a lot of issues (#482, #481, #479, #476, #473, #460, #456, #454, #453, #447, #443, #434, #422, #421, #399, #379, #378, #357, #318, #316, #242, #232, #211, #203, #185, #184, #161). In order to support all of scale_x_() an scale_y_*(), we always use linear axis types, and supply ticktext/tickvals to plotly.js. This has some unfortunate consequences on hoverformatting, which may be addressed in future releases of plotly.js -- https://github.com/plotly/plotly.js/issues/320

2.5.0 -- 1 Mar 2016

NEW FEATURES

New event_data() function provides easy access to plotly events in shiny. For an example, see https://github.com/ropensci/plotly/tree/master/inst/examples/plotlyEvents
plot_ly() and ggplotly() gain a source argument to differentiate between plotly events in shiny apps with multiple plots. ggplotly() also gains width and height arguments.

CHANGES

The arguments filename, fileopt, world_readable in ggplotly() were removed as they should be provided to plotly_POST() instead.

2.4.4 -- 13 Feb 2016

as.widget() now returns htmlwidget objects untouched. See #449.

2.4.3 -- 11 Feb 2016

Ensure that we always return HTTPS links. Fixes #455

2.4.2 -- 9 Feb 2016

Fix for on-premise domain configuration.

2.4.1 -- 2 Feb 2016

Attach base_url in as.widget() so it works in multiple contexts

2.4.0 -- 1 Feb 2016

Pass plot configuration using ... to avoid conflicts in defaults/documentation
Upgrade to plotly.js 1.5.1

2.3.4 -- 1 Feb 2016

Added a plotly_api_domain environment variable for configuring the API domain. Fixes #441

2.3.3 -- 27 Jan 2016

Bump axis number for each trace matching a panel number. fixes #318

2.3.2 -- 25 Jan 2016

More accurate list of data_array properties. Fixes #415

2.3.1 -- 25 Jan 2016

More accurate conversion of path width. Fixes #373.

2.3.0 -- 19 Jan 2016

Add sharing argument and deprecate world_readable. Fixes #332

2.2.4 -- 18 Jan 2016

Fix for error in embed_notebook(). See #409.

2.2.3 -- 18 Jan 2016

Fix for geom_vline(). See #402.

2.2.2 -- 18 Jan 2016

Fix bar orientation when we detect geom_bar() + coord_flip() in ggplotly(). Fixes #390.

2.2.1 -- 18 Jan 2016

Search for axis title in scene object. fixes #393.

2.2.0 -- 13 Jan 2016

The default for layout.hovermode is now 'closest' for non-line scatter traces

2.1.3 -- 12 Jan 2016

Fix size and alpha translation for geom_point. Fixes #386

2.1.2 -- 11 Jan 2016

Upgraded to plotlyjs 1.4.1. For a list of changes, see https://github.com/plotly/plotly.js/releases/tag/v1.4.1

2.1.1 -- 11 Jan 2016

Upgraded to plotlyjs 1.4. For a list of changes, see https://github.com/plotly/plotly.js/releases/tag/v1.4.0

2.1.0 -- 29 Dec 2015

plot_ly() now defaults to inherit=FALSE and plotly_build() is now idempotent. Fixes #280 and #277. See #368 for details.

2.0.19 -- 23 Dec 2015

Added as.widget() function for conveniency in converting plotly object to htmlwidget objects. See #294.

2.0.18 -- 22 Dec 2015

Fix #365

2.0.17 -- 22 Dec 2015

Fix #358

2.0.16 -- 18 Dec 2015

Require ggplot2 2.0.0 or higher. For details, see #269.

2.0.15 -- 13 Dec 2015

Fix #346

2.0.14 -- 13 Dec 2015

Fix #212

2.0.13 -- 12 Dec 2015

Fix #286

2.0.12 -- 11 Dec 2015

Fix #221

2.0.11 -- 11 Dec 2015

Fix #250

2.0.10 -- 10 Dec 2015

Fix #225

2.0.9 -- 10 Dec 2015

Fix #333

2.0.8 -- 10 Dec 2015

Fix a bug with geom_segment (see #321 & #228)

2.0.7 -- 10 Dec 2015

Fix #233

2.0.6 -- 2 Dec 2015

Upgrade to plotlyjs 1.1.1. Fixes #319.

2.0.5 -- 1 Dec 2015

Fix for legend names. See #236.

2.0.4 -- 28 Nov 2015

Fix #313.

2.0.3 -- 18 Nov 2015

Fixed bug causing knitr options to be ignored. Also added VignetteBuilder to DESCRIPTION to vignette is available.

2.0.2 -- 17 Nov 2015

Using plotly_build() on a ggplot object should always return a plotly object

2.0.1 -- 17 Nov 2015

Better printing of server figures. Documentation and other fixes for initial CRAN release!

2.0.0 -- 2 Nov 2015

Added a dependency on htmlwidgets and 'offline' plots are now the default. If you want to create a figure on a plotly server, you need to use plotly_POST(). Also added a config() function to control the default appearance of the interactive plot

1.0.10 -- 3 Nov 2015

Fixed #292.

1.0.9 -- 28 Sep 2015

Fixed filename, fileopt arguments in plot_ly. Specifying the same filename will now overwrite the plot if it exists.

1.0.8 -- 14 Sep 2015

Added the plotly_IMAGES() function which interfaces to the images endpoint https://api.plot.ly/v2/#images

Details -> https://github.com/ropensci/plotly/pull/279

1.0.7 -- 26 Aug 2015

See https://github.com/ropensci/plotly/pull/275

1.0.6 -- 25 Aug 2015

Fix a bug with subplot domain calculations (see https://github.com/ropensci/plotly/pull/274)

1.0.5 -- 20 Aug 2015

Fix issue converting plotly offline markdown documents to HTML when using markdown::markdownToHTML

1.0.4 -- 14 Aug 2015

Bug fix for subplot. See #265

1.0.3 -- 7 Aug 2015

Improved legend positioning. See #241

1.0.2 -- 2 Aug 2015

last_plot() will now look for the last plotly object; if not found, it will try to find the last ggplot object.
Officially added the filename, fileopt, and world_readable arguments to plot_ly() and ggplotly().
If plotly offline is not available, the shiny.launch.browser option is changed to open a web brower. See #245.
Various namespace/documentation improvements for R CMD check.

1.0.1 -- 2 Aug 2015

Removed the stream() function as it wasn't ready to be included.

1.0.0 -- 31 July 2015

A major reworking of package internals which includes a few backwards incompatible changes.

Major changes include:

(1) New high-level grammar for expressing Plotly graphs from R (see the plot_ly(), add_trace(), layout(), and style() functions). (2) New print methods which make it easier to create, modify, and embed Plotly graphs. (3) Added a subplot() function for putting several graphs on a single page. (4) Added the renderPlotly() and plotlyOutput() functions for embedding plotly graphs in shiny applications. (5) Added offline() function for creating standalone HTML pages via Plotly Offline (see http://purchasing.plot.ly/)

For more details, see the new vignettes with browseVignettes(package = "plotly") and/or the pull request -> https://github.com/ropensci/plotly/pull/226

0.6.3 -- 2 June 2015

Add new tests inspired by the R Cookbook distributions #214

0.6.2 -- 19 May 2015

In geom_bar(stat = "identity"), sum y values if multiple for a given x.

0.6.1 -- 5 May 2015

Add test-cookbook-lines.R and fix bugs that showed up in those tests.

0.6 -- 4 May 2015

Let gg2list() return a figure object (backwards incompatible change).

0.5.29 -- 16 April 2015

geom_density() as filled area chart #202

0.5.28 -- 15 April 2015

Let ggplot handle histogram binning. Fix #198

0.5.27 -- 19 Mar 2015

Reimplement geom_ribbon as a basic polygon. Fix #191. Fix #192.

0.5.26 -- 18 Mar 2015

Implemented geom_rect #178

0.5.25 -- 10 March 2015

Implemented geom_smooth() #183

0.5.24 -- 10 March 2015

Implemented facet_wrap(scales="free") #167

0.5.23 -- 10 March 2015.

geom_ribbon() now respects alpha transparency

0.5.22 -- 2 March 2015.

Fixes for ylim() #171.

0.5.21 -- 23 February 2015.

Fixes for error bars and tick marks.

0.5.20 -- 9 February 2015.

Add alpha transparency to fill conversion. Let geom_area support colour and fill aesthetics.

0.5.19 -- 23 January 2015.

Support class conversion such as as.Date() within ggplot code.

0.5.18 -- 22 January 2015.

Return proper filepath when filename contains directories.

0.5.17 -- 30 December 2014.

Support date-time binning in histograms.

0.5.16 -- 29 December 2014.

Support colour aesthetic in geom_text().

0.5.15 -- 19 December 2014.

Use proper RCurlOptions in get_figure() method.

0.5.14 -- 1 December 2014.

Make layers geom_line + geom_point only one trace in Plotly.

0.5.13 -- 27 November 2014.

Rename translation file and server endpoint parameter to be hip.

0.5.12 -- 12 November 2014.

Improve legend title position.

0.5.11 -- 11 November 2014.

Show legend title.

0.5.10 -- 7 November 2014.

Improve showlegend and fix legend’s x position.

0.5.9 -- 3 November 2014.

Default colours for geom_polygon().

0.5.8 -- 30 October 2014.

Support hline over a factor x range. Default colours for geom_boxplot().

0.5.7 -- 29 October 2014.

Default colours for geom_area() and geom_ribbon().

0.5.6 -- 28 October 2014.

Convert line size faithfully.

0.5.5 -- 24 October 2014.

Support category histograms (with factors).

0.5.4 -- 22 October 2014.

Support conversion of geom_vline().

0.5.3 -- 21 October 2014.

Support conversion of geom_bar() with position_dodge().

0.5.2 -- 18 October 2014.

Support aesthetic shape in geom_path() and, hence, geom_line() (conversion).

0.5.1 -- 15 October 2014.

Do not show zero lines by default (as in ggplot2 plots).

0.5.0 -- 15 October 2014.

From now on, version numbers are meaningful again... Many changes meanwhile, especially support for more geoms.

0.4 -- 7 April 2014.

Re-write geom to trace conversion code.

0.3.8 -- 21 March 2014.

ggplotly takes the last_plot() by default.

Support for ggplotly layout elements title, tickcolor, gridcolor, showlegend, plot_bgcolor, paper_bgcolor, tickangle, axis titles, plot border colors.

0.3.7 -- 14 March 2014.

For ggplotly:

if on the command line, open a web browser (as before).
if in knitr/Rmd in a chunk with plotly=TRUE, embed the plot.

0.3.6 -- 10 March 2014.

Merge ggplotly code.

0.3.5

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