Pie Charts
Usage
piechart(x, labels=names(x), shadow=FALSE,
edges=200, radius=0.8, fill=NULL, main=NULL, ...)
Arguments
x
|
a vector of positive quantities.
The values in x are displayed as the areas of pie slices.
|
labels
|
a vector of character strings giving names for
the slices.
|
shadow
|
a logical vector indicating whether a shadow
effect should be attempted for the chart.
This only makes sense if the slices are filled with colors.
|
edges
|
the circular outline of the pie is approximated by a
polygon with this many edges.
|
radius
|
the pie is drawn centered in a square box
whose sides range from -1 to 1.
If the character strings labeling the slices are long it
may be necessary to use a smaller radius.
|
col
|
a vector of colors to be used in filling
the slices.
|
main
|
an overall title for the plot.
|
...
|
graphical parameters can be given as arguments to piechart .
|
Description
Pie charts are a very bad way of displaying information.
The eye is good at judging linear measures and bad at judging relative areas.
A bar chart or dot chart is a preferable way of displaying this
type of data.See Also
dotplot
.Examples
piechart(rep(1,24), col=rainbow(24), radius=0.9)
pie.sales <- c(0.12, 0.3, 0.26, 0.16, 0.04, 0.12)
names(pie.sales) <- c("Blueberry", "Cherry",
"Apple", "Boston Cream", "Other", "Vanilla Cream")
piechart(pie.sales,
col=c("purple", "violetred1", "green3",
"cornsilk", "cyan", "white"))
piechart(pie.sales,
col=gray(seq(0.4,1.0,length=6)))