stat_contour {ggplot2} | R Documentation |
Contours of 3d data
stat_contour(mapping=NULL, data=NULL, geom="path", position="identity", na.rm=FALSE, ...)
mapping |
mapping between variables and aesthetics generated by aes |
data |
dataset used in this layer, if not specified uses plot dataset |
geom |
geometric used by this layer |
position |
position adjustment used by this layer |
na.rm |
NULL |
... |
ignored |
This page describes stat_contour, see layer
and qplot
for how to create a complete plot from individual components.
A layer
The following aesthetics can be used with stat_contour. Aesthetics are mapped to variables in the data with the aes
function: stat\_contour(\code{aes}(x = var))
x
: x position (required)
y
: y position (required)
z
: z position (required)
group
: how observations are divided into different groups
order
: NULL
Hadley Wickham, http://had.co.nz/
## Not run: # Generate data volcano3d <- melt(volcano) names(volcano3d) <- c("x", "y", "z") # Basic plot v <- ggplot(volcano3d, aes(x, y, z = z)) v + stat_contour() # Setting bins creates evenly spaced contours in the range of the data v + stat_contour(bins = 2) v + stat_contour(bins = 10) # Setting binwidth does the same thing, parameterised by the distance # between contours v + stat_contour(binwidth = 2) v + stat_contour(binwidth = 5) v + stat_contour(binwidth = 10) v + stat_contour(binwidth = 2, size = 0.5, colour = "grey50") + stat_contour(binwidth = 10, size = 1) # Add aesthetic mappings v + stat_contour(aes(size = ..level..)) v + stat_contour(aes(colour = ..level..)) # Change scale v + stat_contour(aes(colour = ..level..), size = 2) + scale_colour_gradient(low = "brown", high = "white") # Set aesthetics to fixed value v + stat_contour(colour = "red") v + stat_contour(size = 2, linetype = 4) # Try different geoms v + stat_contour(geom="polygon", aes(fill=..level..)) v + geom_tile(aes(fill = z)) + stat_contour() # Use qplot instead qplot(x, y, z, data = volcano3d, geom = "contour") qplot(x, y, z, data = volcano3d, stat = "contour", geom = "path") ## End(Not run)