I’d like to ban pie charts. I know it’s a bit over the top, but I honestly can’t see a single thing they do better than other graph type (like a 100% stacked bar). They are also hopeless at lots of other things, namely:
- You can’t trend with them. Yes, you can put a few sad pies in a line, but you just don’t get the same instant understanding as a line chart or a bar chart. It’s very rare that we just look at one set of data, normally we are looking to see changes (or to inspire change).
- They are really hard to read when some segments are much bigger than others, the smaller values get rapidly drowned by the line thickness.
- You can’t put target points on them