piechart {base} | R Documentation |
Draw a pie chart.
piechart(x, labels=names(x), shadow=FALSE, edges=200, radius=0.8, fill=NULL, main=NULL, ...)
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 . |
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.
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)))