How to draw Pie Chart in R programming language

Pie Chart is a pictorial representation of proportions in a whole as sectors in a circle.

Draw Pie Chart in R programming language

R programming language provides two functions – pie() and pie3d() to draw pie charts.

 

Syntax of R pie function

pie(x, labels = NULL, edges = 200, radius = 0.8,
clockwise = FALSE, init.angle = 0,
density = NULL, angle = 0, col = NULL, border = NULL,
lty = NULL, main = NULL, …)

where

  • x [mandatory] is a numerical vector with values >=0. Each values decides the proportion of circle.
  • labels is a character vector. They are names for the slices.
  • edges the circular outline of the pie is approximated by a polygon with this many edges.
  • radius of the circle in pie chart.
  • clockwise represents the logical indicating if slices are drawn clockwise or counter clockwise. counter clockwise is default. {TRUE,FALSE}
  • init.angle is the initial angle(in degrees) to start with for drawing sectors. [0,360]
  • density of shading lines, in lines per inch
  • angle is the slope of shading lines in degrees (counter-clockwise).
  • col is a vector of colors to be used in filling or shading the slices.
  • border, lty – arguments passed to polygon which draws each slice.
  • main is an overall title for the plot.
  • … is graphical parameters can be given as arguments to pie. They will affect the main title and labels only.

 

Example 1 – Simple Pie Chart

When the above program is run, following pie chart is created at the location of your Rscript.
Simple Pie Chart example with R programming language

Example 2 – Pie Chart with Striped Lines

Example R Pie Chart with Striped Lines

Example Pie Chart with Edged sectors

Edged R Pie Chart Example

Syntax of R pie3D function

plotrix library is required to use it in an Rscript

pie3D(x,edges=NA,radius=1,height=0.1,theta=pi/6,start=0,border=par(“fg”),
col=NULL,labels=NULL,labelpos=NULL,labelcol=par(“fg”),labelcex=1.5,
sector.order=NULL,explode=0,shade=0.8,mar=c(4,4,4,4),pty=”s”,…)


x
 [mandatory] is a numerical vector with values >=0. Each values decides the proportion of circle.where

  • labels is a character vector. They are names for the slices.
  • radius of the circle in pie chart.
  • col is a vector of colors to be used in filling or shading the slices.
  • main is an overall title for the plot.
  • explode is the amount by which sectors are exploded
  • … extra arguments

Example 1 – Simple 3D Pie Chart in R

When the above program is run, following pie chart is created at the location of your Rscript.

Simple 3D Pie Chart example with R programming language

Conclusion :

In this R Tutorial, we have learnt to draw Pie Chart in R programming language in 2D and 3D.