Warning
Piecharts are highly criticized in dataviz. Use it with care, or even better, use alternatives like barcharts, lollipop plots, treemap and others.
What's wrong with it? Barchart Lollipop
Step by step → the
pie() function
The pie() function is natively provided in
R. It allows to build nice piechart in seconds. Here is
an overview of its functioning:
Step by step → the
ggplot2 package
There is no specific geom to build piechart with
ggplot2. The trick is to build a
barplot and use coord_polar to make it circular. This is
why the pie() function described above is probably a
better alternative.
