| ggcontour {ggplot} | R Documentation |
Create a grob to display contours of a 3D data set.
ggcontour(plot = .PLOT, aesthetics=list(), ..., data=NULL)
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 |
Aesthetic mappings that this grob function understands:
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 grob_path
Hadley Wickham <h.wickham@gmail.com>
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)))