Matplotlib has a number of built-in colormaps accessible via matplotlib.colormaps. There are also external libraries that have many extra colormaps, which can be viewed in the Third-party colormaps section of the Matplotlib documentation. Here we briefly discuss how to choose between the many options.

Reference for colormaps included with Matplotlib. A reversed version of each of these colormaps is available by appending _r to the name, as shown in Reversed colormaps.

You can then use mapper.to_rgba(v) to map from an input value v, via your normalised scale, to a target color. for v in sorted(lst): print("%.4f: %.4f" % (v, mapper.to_rgba(v)[0]) ) Produces the output:

I want to use matplotlib's colormaps to map this number to a color, but not plot anything. Basically, I want to be able to choose the colormap with mpl.cm.autumn for example, use mpl.colors.Normalize(vmin = -20, vmax = 10) to set the range, and then map x to the corresponding color.

Jul 21, 2020 · Create a map containing multiple vector datasets, colored by unique attributes in Python. Add a custom legend to a map in Python with subheadings, unique colors.

Dec 23, 2024 · matplotlib.colors.Colormap class allows you to map scalar values to RGBA (Red, Green, Blue, Alpha) colors. This enhances the clarity and depth of your data representation, making it easier to interpret complex data patterns through effective color coding.

May 3, 2024 · Explore color maps in Matplotlib for effective data visualization. Learn how to choose the right colormap to convey accurate information for your plots.

More generally, you may create a colormap first and take the colors of the map, at non-equidistant steps. E.g. if cmap is the original colormap, then cvals=[-12, -2,0,2,12]; colors = cmap(plt.Normalize(-12,12)(np.array(cvals))) will give you the new colors for the squeezed map.

Aug 8, 2024 · Matplotlib colormaps are an essential tool for data visualization in Python. They provide a way to map numerical data to colors, allowing for intuitive and visually appealing representations of complex datasets.

Oct 27, 2024 · Here are some alternative color maps (cmaps) you can use in your maps to convey different visual styles or highlight specific features. These are built into Matplotlib, and you can specify them...