ggcontour: Grob function: contours Create a grob to display contours of...

In hadley/ggplot1: Before there was ggplot2

Grob function: contours Create a grob to display contours of a 3D data set.

Description

Aesthetic mappings that this grob function understands:

Usage

ggcontour(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)

• z:z position (required)

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:

• nlevels: number of contours to draw

• levels: contour positions

• ...: other aesthetic parameters passed to ggpath

See Also

gg2density

Examples

volcano3d <- data.frame(expand.grid(x = 1:nrow(volcano), y=1:ncol(volcano)), z=as.vector(volcano))
p <- ggplot(volcano3d, aesthetics=list(x=x,y=y,z=z))
ggcontour(p)
ggcontour(p, colour="red")
ggcontour(p, nlevels=3)
ggcontour(ggtile(p, list(fill=z)))

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