stat_contour {ggplot2}R Documentation

stat_contour

Description

Contours of 3d data

Usage

stat_contour(mapping=NULL, data=NULL, geom="path", position="identity", na.rm=FALSE, ...)

Arguments

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

Details

This page describes stat_contour, see layer and qplot for how to create a complete plot from individual components.

Value

A layer

Aesthetics

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))

Author(s)

Hadley Wickham, http://had.co.nz/

See Also

Examples

## 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)

[Package ggplot2 version 0.8.2 Index]