Graph colors by variable

The colorvar() option allows many twoway plots to vary the color of markers, bars, and more based on the values of a variable.

ggplot2 - Custom colors for discrete values in geom_bar in ggplot

New in Stata 18

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Chapter 6 Visual variables Elegant and informative maps with tmap

python - plot different color for different categorical levels

Detailed Guide to the Bar Chart in R with ggplot

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