Equalize x-y axis limits

Quickly set the x and y axis limits to be the same for a given axis. Can be used with a single or multiple axis.

This function cas be used to quickly set the x and y axis limits to be the same for a given axis. For example, this can be useful in scatterplots to assess the relationship between the independent and the dependent variables, or qq-plots.

In the case you have multiple subplots on one figure, this function can be used to a) treat each subplot separately, or b) use common limits for all subplots