lgca.plots.cmap_discretize

lgca.plots.cmap_discretize(cmap, N)

Downsample the near-continuous colormap cmap to the number of colors N.

Parameters:

  • cmap (str or matplotlib.colors.Colormap) – Colormap to be discretized, e.g. matplotlib.cm.jet or 'jet'.

  • N (int) – Number of colors of the new colormap.

Returns:

Discretized colormap with N colors.

Examples

>>> import numpy as np
>>> import matplotlib.cm as cm
>>> import matplotlib.pyplot as plt
>>> x = np.resize(np.arange(100), (5,20))
>>> # discretize jet colormap
>>> djet = cmap_discretize(cm.jet, 5)
>>> # show color limits
>>> plt.imshow(x, cmap=djet)

The name of the colormap is updated to cmap.name + '_N':

>>> djet.name
'jet_5'