colormap

############################# COLORMAP documentation #############################

Please see : http://colormap.readthedocs.io/ for an up-to-date documentation.

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What is it ? ################

colormap package provides utilities to convert colors between RGB, HEX, HLS, HUV and a framework to easily create and build colormaps for matplotlib. All matplotlib colormaps and some R colormaps are also available altogether. The plot_colormap method (see below) is handy to quickly pick up a colormaps and the test_colormap is useful to see a live version of the new colormap.

Installation ###################

::

pip install colormap

Usage examples ###############

• convert RGB to HEX:

::

from colormap import rgb2hex, hex2rgb

hex_color = rgb2hex(255, 0, 0)  # Red color in HEX
print(hex_color)  # Output: "#ff0000"

rgb_color = hex2rgb("#ff0000")  # Convert back to RGB
print(rgb_color)  # Output: (255, 0, 0)

2. Generate a Custom colormap:

Create your own colormap. For instance, from red to green colors with intermediate color as whitish (diverging map from red to green)::

  from colormap import Colormap
  c = Colormap()
  mycmap = c.cmap( {'red':[1,1,0], 'green':[0,1,.39], 'blue':[0,1,0]})
  cmap = c.test_colormap(mycmap)

Even simpler if the colormap is linear using color's name::

  from colormap import Colormap
  c = Colormap()
  mycmap = c.cmap_linear('red', 'white', 'green(w3c)')
  cmap = c.test_colormap(mycmap)

.. image:: https://colormap.readthedocs.io/en/latest/_images/quickstart-6.png :width: 50% :align: center

• Visualise existing matplotlib colormap:

::

  from colormap import plot_colormap, plot_category
  plot_colormap("viridis")

Using the Colormap instance, you can see all valid names using::

  c.colormaps

Matplotlib is very well known in the PYthon ecosystem and has categorised colormaps into categories such as a "diverging". To visualise all of them::

  plot_category('diverging')

.. image:: https://colormap.readthedocs.io/en/latest/_images/quickstart-4.png :width: 50% :align: center

Other sets of colormaps are : sequentials, sequentials2, misc, diverging, qualitative

See online documentation for details: http://colormap.readthedocs.io/

changelog #########

========= ================================================================================ Version Description ========= ================================================================================ 1.3.0 * support for poetry 2.0 thanks to @cjwatson PR#26 * Slightly better doc 1.2.0 1.1.0 * switch to pyproject. remove easydev dependency. compat for python 3.11 and 3.12 1.0.6 * Fix a matplotlib deprecation * Fix RTD documentation 1.0.5 * remove Python3.6 and added Python3.10 to CI action * Fix issue in setup reported in https://github.com/cokelaer/colormap/pull/14 * add requirements in MANIFEST * applied black on all files ========= ================================================================================