Pie Charts in R

• quite often used for sales and marketing purposes because they are said to be able to manipulate the perception.
• not often used in scientific papers

to create the slices and define the size slices = c(40, 20, 40)

slices = c(40, 20, 40)

name (labels) of the slices - WATCH the length

countries = c("US", "UK", "Other")

to add the slice size to the labels

countries = paste(countries, slices)

countries = paste(countries, slices)

countries = paste(countries, "%", sep = "")

Sytax for pie chart

pie(slices, labels=countries, col=c("red", "blue", "white"), main ="Sales Distribution")

if we need to draw pie chart using existing data set , we can use iris data set as below.

attach(iris)
Values = table(Species) # table for counts
labels = paste(names(Values)) pie(Values, labels =labels, main ="Species Distribution")

Draw to 3D format we need the plotrix library.

library(plotrix)
pie3D(slices, labels=countries, explode = 0.05, col=c("red", "blue", "white"), main ="Sales Distribution")