dual axis

56 posts
Use dual axes with care, if at all

Dual axes, where there are two value scales in a single chart, are almost never a good idea. As a reader, you should always question the source when you see a chart that uses such scales. Zan Armstrong explains with a recent example. One of the best descriptions I’ve heard for data viz is that: when the data is different, the viz should look different and when the data is...

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