Stephen Few has written about lollipop charts in his latest blog. “Malformed bar graphs,” he calls them. The poor things – lollipops are more than that.
The problem is, he didn’t consider the problem I was trying to solve when I first created them in 2011*:
Problem: A bar chart with many bars of a long length are unpleasant to look at.
I believe lollipops create a visual experience which is easier to look at. In his post, Steve used an example using 7 bars with a large range. I didn’t create the lollipop for that situation. While I believe a bar or lollipop works for that kind of data, criticizing the lollipop without addressing the original intention is disingenuous. I did consider fat bars and thin lines, too, in seeking a solution. Fat bars are just too inky, and the thin lines don’t have enough definition. Lollipops are an attractive compromise to solve the problem.
*Did I invent lollipop charts? Alberto Cairo credited me with their invention in his book The Truthful Art, and I’m not going to argue against that! The images on my original post are no longer available, unfortunately.