Enable logarithmic scale in evolution charts #3661
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Enhancement
For new feature suggestions that enhance Matomo's capabilities or add a new report, new API etc.
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If a site experiences exceptional traffic peaks, it would make a lot sense to change the linear y-scale to a logarithmic scale.
For instance, consider the following pattern (data taken from a real website). The linear scale does a good job in giving a sense of the magnitude of the peak, but the patterns in the regular traffic are not perceivable anymore.
[[Image(http://vis4.net/tmp/linear-scale.png)]]
The next picture shows the same data on a log scale, which gives additional insight. We can see how the traffic decreases in two weeks after the peak and then it slightly increases again over the next four weeks.
[[Image(http://vis4.net/tmp/logarithmic-scale.png)]]
I know that this is a feature for pro data analysis, and thus the UI doesn't need to be super flashy. Most users don't need this, so we don't want to put it in their way. I recommend to use shift-clicking on the y-axis labels to toggle between linear and logarithmic scale.
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