metaseq.plotutils.prepare_logged

metaseq.plotutils.prepare_logged(x, y)

Transform x and y to a log scale while dealing with zeros.

This function scales x and y such that the points that are zero in one array are set to the min of the other array.

When plotting expression data, frequently one sample will have reads in a particular feature but the other sample will not. Expression data also tends to look better on a log scale, but log(0) is undefined and therefore cannot be shown on a plot. This function allows these points to be shown, piled up along one side of the plot.

Parameters:x,y – NumPy arrays