ggtile: Grob function: tile

In hadley/ggplot1: Before there was ggplot2

Description

The tile grob will tile the plot surface as densly as possible, assuming that every tile is the same size. It is similar to levelplot or image.

Usage

ggtile(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

Aesthetic mappings that this grob function understands:

• x:x position (required)

• y:y position (required)

• width:width of the rectangle

• height:height of the rectangle

• fill:fill colour (see sccolour)

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

See Also

ggrect, resolution

Examples

pp <- function (n,r=4) {
 x <- seq(-r*pi, r*pi, len=n)
 df <- expand.grid(x=x, y=x)
 df$r <- sqrt(df$x^2 + df$y^2)
 df$z <- cos(df$r^2)*exp(-df$r/6)
 df
}
p <- ggplot(pp(20), aes=list(x=x,y=y))
ggtile(p) #pretty useless!
ggtile(p, list(fill=z))
ggtile(p, list(height=abs(z), width=abs(z)))
ggtile(ggplot(pp(100), aes=list(x=x,y=y,fill=z)))
ggtile(ggplot(pp(100, r=2), aes=list(x=x,y=y,fill=z)))
p <- ggplot(pp(20)[sample(20*20, size=200),], aes=list(x=x,y=y,fill=z))
ggtile(p)

hadley/ggplot1 documentation built on Aug. 19, 2019, 2:42 p.m.