⏱ Quick start
matplotlib allows to build a pie chart easily thanks to its
The input data you must provide is an array of numbers, where each numbers will be mapped to one of the pie item.🔥
# library import matplotlib.pyplot as plt # create data: an array of values size_of_groups=[12,11,3,30] # Create a pieplot plt.pie(size_of_groups) plt.show()
⚠️ Mind the pie chart
Pie chart is probably the most criticized chart type. Humans are pretty bad at reading angles, making it hard to rank the groups accurately. Most of the time, it is better to display the information as a barchart, a treemap or a lollipop plot.
Have a look to the 3 pie charts below, can you spot the pattern hidden in it?
Can you spot the pattern hidden behind those 3 pie charts? Click to see the same info visualized as barplots: much more insightful isn't it?
Last but not least, please avoid the
shadow options of the pie() function, they are killing all the most basic dataviz principles.
Pie chart with
The examples below should guide you through the
pie() function usage. It starts basics and then show how to add labels, customize colors and more.