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What is the difference between plotly colorscale and plotly samplepoints?


Asked by Jordyn Porter on Dec 09, 2021 FAQ



The colorscale can be specified as a list of [scale, color] pairs, as a list of colors, or as a named plotly colorscale. The samplepoints can be specefied as an iterable of specific points in the range [0.0, 1.0], or as an integer number of points which will be spaced equally between the low value (default 0.0) and the high value (default 1.0).
Subsequently,
The colorscale can be specified as a list of [scale, color] pairs, as a list of colors, or as a named plotly colorscale. The samplepoints can be specefied as an iterable of specific points in the range [0.0, 1.0], or as an integer number of points which will be spaced equally between the low value (default 0.0) and the high value (default 1.0).
Besides, Color Scales in Plotly Express By default, Plotly Express will use the color scale from the active template 's layout.colorscales.sequential attribute, and the default active template is plotly which uses the Plasma color scale. You can choose any of the built-in color scales, however, or define your own.
Additionally,
Diverging color scales have a well-defined midpoint color, and are best-used when that midpoint is mapped to a meaningful data value. The color_continuous_midpoint argument to most Plotly Express functions is used for this.
Likewise,
Qualitative color sequences are appropriate for data that has no natural ordering, such as categories, colors, names, countries etc. The color sequences in this module are mostly meant to be passed in as the color_discrete_sequence argument to various functions.