ggpath: Grob function: path

In hadley/ggplot1: Before there was ggplot2

Grob function: path

Description

Aesthetic mappings that this grob function understands:

Usage

ggpath(plot, aesthetics = list(), ..., data = NULL)

Arguments

plot	the plot object to modify
aesthetics	named list of aesthetic mappings, see details for more information
...	other options, see details for more information
data	data source, if not specified the plot default will be used

Details

• x:x position (required)

• y:y position (required)

• id:identifier variable used to break up into multiple paths

• size:size of the line, in mm (see scsize)

• colour:line colour (see sccolour)

• linetype:line style/type (see sclinetype)

These can be specified in the plot defaults (see ggplot) or in the aesthetics argument. If you want to modify the position of the points or any axis options, you will need to add a position scale to the plot. These functions start with ps, eg. pscontinuous or pscategorical

Other options:

• none

Examples

library(ggplot2movies)
myear <- do.call(rbind, by(movies, movies$year, function(df) data.frame(
  year = df$year[1],
  mean.length = mean(df$length),
  mean.rating = mean(df$rating)
)))
p <- ggplot(myear, aesthetics=list(x=mean.length, y=mean.rating))
ggpath(p)
ggpath(p, list(size=year))
ggpath(p, list(colour=year))
ggpath(scsize(p, c(0.5,1)), list(size=year))
ggpath(scsize(p, c(0.5,1)), list(size=year))
p <- ggplot(mtcars, aesthetics=list(x=drat, y=wt))
ggpath(p)
ggpath(p, list(id=cyl))
ggpath(p, list(id=cyl, linetype=cyl))

hadley/ggplot1 documentation built on Dec. 1, 2024, 11:23 a.m.