R: Pie Charts

piechart {base}

R Documentation

Pie Charts

Description

Draw a pie chart.

Usage

piechart(x, labels = names(x), edges = 200, radius = 0.8, col = 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.

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.

Note

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.

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)))