| filled.contour {base} | R Documentation |
This function produces a contour plot with the areas between the contours filled in solid color (Cleveland calls this a level plot). A key showing how the colors map to z values is shown to the right of the plot.
filled.contour(x = seq(0, 1, len = nrow(z)),
y = seq(0, 1, len = ncol(z)),
z,
xlim = range(x, finite=TRUE),
ylim = range(y, finite=TRUE),
zlim = range(z, finite=TRUE),
levels = pretty(zlim, nlevels), nlevels = 20,
color.palette = cm.colors,
col = color.palette(length(levels) - 1),
plot.title, plot.axes, key.title, key.axes,
asp = NA, xaxs = "i", yaxs = "i", las = 1, axes = TRUE,
...)
x,y |
locations of grid lines at which the values in z are
measured. These must be in ascending order. By default, equally
spaced values from 0 to 1 are used. If x is a list,
its components x$x and x$y are used for x
and y, respectively. If the list has component z this
is used for z. |
z |
a matrix containing the values to be plotted (NAs are
allowed). Note that x can be used instead of z for
convenience. |
xlim |
x limits for the plot. |
ylim |
y limits for the plot. |
zlim |
z limits for the plot. |
levels |
a set of levels which are used to partition the range
of z. Areas with z values between consecutive
levels are painted with the same color. |
nlevels |
if levels is not specified, the range of z,
values is divided into approximately this many levels. |
color.palette |
a color palette function to be used to assign colors in the plot. |
col |
an explicit set of colors to be used in the plot. This argument overrides any palette function specification. |
plot.title |
statements which add titles the main plot. |
plot.axes |
statements which draw axes on the main plot. This overrides the default axes. |
key.title |
statements which add titles for the plot key. |
key.axes |
statements which draw axes on the plot key. This overrides the default axis. |
asp |
the y/x aspect ratio, see plot.window. |
xaxs |
the x axis style. The default is to use internal labeling. |
yaxs |
the y axis style. The default is to use internal labeling. |
las |
the style of labeling to be used. The default is to use horizontal labeling. |
... |
additional graphical parameters. |
This function currently uses the layout function and so
is restricted to a full page display. In future it is likely to
be replaced by a genuine levelplot function which will
work in multipanel displays.
Ross Ihaka.
Cleveland, W. S. (1993) Visualizing Data. Summit, New Jersey: Hobart.
data(volcano)
filled.contour(volcano, color = terrain.colors, asp = 1)# simple
x <- 10*1:nrow(volcano)
y <- 10*1:ncol(volcano)
filled.contour(x, y, volcano, color = terrain.colors,
plot.title = title(main = "The Topography of Maunga Whau",
xlab = "Meters North", ylab = "Meters West"),
plot.axes = { axis(1, seq(100, 800, by = 100))
axis(2, seq(100, 600, by = 100)) },
key.title = title(main="Height\n(meters)"),
key.axes = axis(4, seq(90, 190, by = 10)))# maybe also asp=1
mtext(paste("filled.contour(.) from", R.version.string),
side = 1, line = 4, adj = 1, cex = .66)