geom_timeline: geom_timeline
In Darwinita/EarthquakingLCP: Functions to process and analyze data from NOAA

Description Usage Arguments Details Value Aesthetics for geom_timeline, with the required ones indicated in bold References Examples

A function to plot a timeline of earthquakes.

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geom_timeline(mapping = NULL, data = NULL, stat = "timeline",
  position = "identity", show.legend = NA, inherit.aes = TRUE,
  xmin = NULL, xmax = NULL, na.rm = FALSE, ...)

`mapping`	Set of aesthetic mappings created by `aes` or `aes_`. If specified and `inherit.aes = TRUE` (the default), it is combined with the default mapping at the top level of the plot. You must supply `mapping` if there is no plot mapping.
`data`	The data to be displayed in this layer. There are three options: If `NULL`, the default, the data is inherited from the plot data as specified in the call to `ggplot`. A `data.frame`, or other object, will override the plot data. All objects will be fortified to produce a data frame. See `fortify` for which variables will be created. A `function` will be called with a single argument, the plot data. The return value must be a `data.frame.`, and will be used as the layer data.
`stat`	Statistical transformation. No data transformation if "identity".
`position`	Position adjustment, either as a string, or the result of a call to a position adjustment function.
`show.legend`	logical. Should this layer be included in the legends? `NA`, the default, includes if any aesthetics are mapped. `FALSE` never includes, and `TRUE` always includes.
`inherit.aes`	If `FALSE`, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. `borders`.
`xmin`	(optional): minimum date for earthquakes
`xmax`	(optional): maximum date for earthquakes
`na.rm`	If `FALSE`, the default, missing values are removed with a warning. If `TRUE`, missing values are silently removed.
`...`	Additional arguments

geom_timeline plots a timeline of earthquakes ranging from xmin to xmax dates with a point for each earthquake. Each point-earthquake is colored according to the number of fatal casualties and its size indicates the magnitudes in Richter's scale.

A ggplot2 layer

Aesthetics for `geom_timeline`, with the required ones indicated in bold

x: DATE
y: COUNTRY, or any other factor for stratification
size: EQ_PRIMARY
color: TOTAL_DEATHS
fill: TOTAL_DEATHS
alpha: transparency = 0-1

https://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1

## Not run: 
xmin = lubridate::ymd_hm("1016-01-01",truncated = 2)
xmax = lubridate::ymd_hm("2016-01-01",truncated = 2)
NOAAdf <- eq_clean_data("signif.txt")
NOAAdfSp <- NOAAdf %>%
  dplyr::filter(COUNTRY %in% c("SPAIN", "IRAN", "BELGIUM"))
ggplot2::ggplot(data = NOAAdfSp, ggplot2::aes(x = DATE,
                            y = COUNTRY
)) +
  geom_timeline(ggplot2::aes(size = EQ_PRIMARY,
                    fill = TOTAL_DEATHS),
                xmin = xmin, xmax = xmax) +
  theme_timeline() +
  ggplot2::labs(size = "Richter scale value", color = "# deaths")

## End(Not run)