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Further improve colormap discussion. #9532

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Oct 31, 2017
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Further improve colormap discussion. #9532

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36d005f
Further improve colormap discussion.
anntzer Oct 23, 2017
7996fd3
Fixed tutorial cm.py
jklymak Oct 31, 2017
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37 changes: 5 additions & 32 deletions examples/color/colormap_reference.py
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Reference for colormaps included with Matplotlib.

This reference example shows all colormaps included with Matplotlib. Note that
any colormap listed here can be reversed by appending "_r" (e.g., "pink_r").
These colormaps are divided into the following categories:

Sequential:
These colormaps are approximately monochromatic colormaps varying smoothly
between two color tones---usually from low saturation (e.g. white) to high
saturation (e.g. a bright blue). Sequential colormaps are ideal for
representing most scientific data since they show a clear progression from
low-to-high values.

Diverging:
These colormaps have a median value (usually light in color) and vary
smoothly to two different color tones at high and low values. Diverging
colormaps are ideal when your data has a median value that is significant
(e.g. 0, such that positive and negative values are represented by
different colors of the colormap).

Qualitative:
These colormaps vary rapidly in color. Qualitative colormaps are useful
for
choosing a set of discrete colors. For example::

color_list = plt.cm.Set3(np.linspace(0, 1, 12))

gives a list of RGB colors that are good for plotting a series of lines on
a dark background.

Miscellaneous:
Colormaps that don't fit into the categories above.
A reversed version of each of these colormaps is available by appending
``_r`` to the name, e.g., ``viridis_r``.

See :doc:`/tutorials/colors/colormaps` for an in-depth discussion about
colormaps, including colorblind-friendliness.
"""

import numpy as np
import matplotlib.pyplot as plt


# Have colormaps separated into categories:
# http://matplotlib.org/examples/color/colormaps_reference.html
cmaps = [('Perceptually Uniform Sequential', [
'viridis', 'plasma', 'inferno', 'magma']),
('Sequential', [
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6 changes: 3 additions & 3 deletions lib/matplotlib/cm.py
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@@ -1,8 +1,8 @@
"""
This module provides a large set of colormaps, functions for
registering new colormaps and for getting a colormap by name,
and a mixin class for adding color mapping functionality.
Builtin colormaps, colormap handling utilities, and the `ScalarMappable` mixin.

See :doc:`/gallery/color/colormap_reference` for a list of builtin colormaps.
See :doc:`/tutorials/colors/colormaps` for an in-depth discussion of colormaps.
"""
from __future__ import (absolute_import, division, print_function,
unicode_literals)
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