Marco tweeted the following pie chart to me (tip from Danilo), which is perfect since today is Pi Day, and I have to do my #onelesspie duty. This started a few years ago with Xan Gregg.
This chart supposedly was published in an engineering journal. I don't have a clue what the question might be that this chart is purportedly answering. Maybe the reason for picking a cellphone?
The particular bits that make this chart hard to comprehend are these:
The chart also fails the ordering rule, as it spreads the largest pieces around.
It doesn't have to be so complicated.
Here is a primitive chart that doesn't even require a graphics software.
Younger readers have not experienced the days (pre 2000) when color printing was at a premium, and most graphics were grayscale. Nevertheless, restrained use of color is recommended.
Happy Pi Day!