mark: Mark

In hrbrmstr/vegalite: Tools to Encode Visualizations with the 'Grammar of Graphics'-Like 'Vega-Lite' 'Spec'

Description

A bar mark represents each data point as a rectangle, where the length is mapped to a quantitative scale.

Usage

mark(vl, mark = "circle", filled = NULL, color = NULL, fill = NULL,
  stroke = NULL, opacity = NULL, fillOpacity = NULL,
  strokeOpacity = NULL, strokeWidth = NULL, strokeDash = NULL,
  strokeDashOffset = NULL, stacked = NULL, interpolate = NULL,
  tension = NULL, orient = NULL, barSize = NULL, shape = NULL,
  size = NULL, tickSize = NULL, tickThickness = NULL)

mark_bar(vl, ...)

mark_circle(vl, ...)

mark_square(vl, ...)

mark_tick(vl, ...)

mark_line(vl, ...)

mark_area(vl, ...)

mark_point(vl, ...)

mark_text(vl, ...)

Arguments

vl	Vega-Lite object
mark	can be "bar", "circle", "square", "tick", "line", "area", "point", and "text". These directly set how the data are drawn and are similar geoms in ggplot2.
filled, color, fill, stroke	see config.mark color docs
opacity, fillOpacity, strokeOpacity	see config.mark opacity docs
strokeWidth, strokeDash, strokeDashOffset	see config.mark stroke docs
stacked	Defunct; Use in encode_x or encode_y
interpolate, tension	for line and area mark, the line interpolation method. value for interpolate can be "linear", "step-before", "step-after", "basis", "basis-open", "basis-closed", "bundle", "cardinal", "cardinal-open", "cardinal-closed", or "monotone", For tension, see D3's line interpolation.
orient	the orientation of a non-stacked bar, area, and line charts. The value is either "horizontal", or "vertical" (default). For bar and tick, this determines whether the size of the bar and tick should be applied to x or y dimension. For area, this property determines the orient property of the Vega output. For line, this property determines the path order of the points in the line if path channel is not specified. For stacked charts, this is always determined by the orientation of the stack; therefore explicitly specified value will be ignored.
barSize	the size of the bars (width or height depending on orient)
shape	applicable to point mark, "circle", "square", "cross", "diamond", "triangle-up", or "triangle-down", or else a custom SVG path string.
size	for point, circle or square mark, the pixel area of a point.
tickSize	the size of ticks
tickThickness	the thickness of ticks.
...	additional arguments passed to mark

References

Vega-Lite Mark spec, Vega-Lite config.mark spec

Examples

dat <- jsonlite::fromJSON('[
    {"a": "A","b": 28}, {"a": "B","b": 55}, {"a": "C","b": 43},
    {"a": "D","b": 91}, {"a": "E","b": 81}, {"a": "F","b": 53},
    {"a": "G","b": 19}, {"a": "H","b": 87}, {"a": "I","b": 52}
  ]')

vegalite() %>%
  add_data(dat) %>%
  encode_x("a", "ordinal") %>%
  encode_y("b", "quantitative") %>%
  mark_bar()
vegalite() %>%
  add_data("https://vega.github.io/vega-editor/app/data/cars.json") %>%
  encode_x("Horsepower", "quantitative") %>%
  encode_y("Miles_per_Gallon", "quantitative") %>%
  mark_circle()
vegalite() %>%
  add_data("https://vega.github.io/vega-editor/app/data/cars.json") %>%
  encode_x("Horsepower", "quantitative") %>%
  encode_y("Miles_per_Gallon", "quantitative") %>%
  mark_circle()
vegalite() %>%
  add_data("https://vega.github.io/vega-editor/app/data/cars.json") %>%
  encode_x("Horsepower", "quantitative") %>%
  encode_y("Miles_per_Gallon", "quantitative") %>%
  mark_square()
vegalite() %>%
  add_data("https://vega.github.io/vega-editor/app/data/cars.json") %>%
  encode_x("Horsepower", "quantitative") %>%
  encode_y("Cylinders", "ordinal") %>%
  mark_tick()
vegalite() %>%
  view_size(300, 300) %>%
  add_data("https://vega.github.io/vega-editor/app/data/driving.json") %>%
  encode_x("miles", "quantitative") %>%
  encode_y("gas", "quantitative") %>%
  encode_order("year", "temporal") %>%
  scale_x_linear_vl(zero=FALSE) %>%
  scale_y_linear_vl(zero=FALSE) %>%
  mark_line()
vegalite() %>%
  view_size(300, 200) %>%
  add_data("https://vega.github.io/vega-editor/app/data/unemployment-across-industries.json") %>%
  encode_x("date", "temporal") %>%
  encode_y("count", "quantitative", aggregate="sum") %>%
  encode_color("series", "nominal") %>%
  scale_color_nominal_vl(scheme="category20b") %>%
  timeunit_x("yearmonth") %>%
  scale_x_time_vl(nice="month") %>%
  axis_x(format="%Y", labelAngle=0) %>%
  mark_area()
vegalite() %>%
  add_data("https://vega.github.io/vega-editor/app/data/cars.json") %>%
  encode_x("Horsepower", "quantitative") %>%
  encode_y("Miles_per_Gallon", "quantitative") %>%
  mark_point()
vegalite() %>%
  view_size(300, 200) %>%
  add_data("https://vega.github.io/vega-editor/app/data/cars.json") %>%
  encode_x("Horsepower", "quantitative") %>%
  encode_y("Miles_per_Gallon", "quantitative") %>%
  encode_color("Origin", "nominal") %>%
  calculate("OriginInitial", "datum.Origin[0]") %>%
  encode_text("OriginInitial", "nominal") %>%
  mark_text()

hrbrmstr/vegalite documentation built on May 17, 2019, 5:38 p.m.