THis function creates a pie chart. Note that these are generally quite strongly advised against, as people are not good at interpreting relative frequencies on the basis of pie charts.
The vector (best to pass a factor).
The ggplot scale fill function to use for the colors.
A ggplot pie chart.
This function is very strongly based on the Mathematical Coffee post at http://mathematicalcoffee.blogspot.com/2014/06/ggpie-pie-graphs-in-ggplot2.html.
Amy Chan; implemented in this package (and tweaked a bit) by Gjalt-Jorn Peters.
Maintainer: Gjalt-Jorn Peters <firstname.lastname@example.org>
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