Sometimes it is useful to remap the colors onto a power-law

relationship (i.e. :math:`y=x^{\gamma}`, where :math:`\gamma` is the

power). For this we use the :func:`colors.PowerNorm`. It takes as an

normalization):

.. note::

Custom normalization: Two linear ranges

It is possible to define your own normalization, as shown in the

example below. This example is plotting the same data as the