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)))