matplotlib
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matplotlib.colors.PowerNorm

class matplotlib.colors.PowerNorm(gamma, vmin=None, vmax=None, clip=False)

Normalize a given value to the [0, 1] interval with a power-law scaling. This will clip any negative data points to 0.

autoscale(A)

Set vmin, vmax to min, max of A.

autoscale_None(A)

autoscale only None-valued vmin or vmax.

inverse(value)