Summary

I encountered some unexpected behavior while usingnmatplotlib.colormaps. Apparently,a_colormap(1) outputs the wrong result. The color it produces is indistinguishable froma_colormap(0), although it is slightly different.a_colormap(1.0) produces the correct result, buta_colormap(1.0) != a_colormap(1).

What is going on? It would be useful to clarify this in thedocs.

Example

frommatplotlibimportcolors,colormapsimportmatplotlib.pyplotaspltprint(colors.to_hex(colormaps["binary"](0)),colors.to_hex(colormaps["binary"](1.0)))print(colors.to_hex(colormaps["binary"](0)),colors.to_hex(colormaps["binary"](1)))

Output

#ffffff #000000#ffffff #fefefe

Proposed fix

Improved documentation, or added consistency to make integer values work for the upper endpoint.