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You can use the following basic syntax to create a histogram by group in ggplot2: ggplot (df, aes (x=values_var, fill=group_var)) + geom_histogram (color='black', alpha=0. apa arti kartu hijau dalam sepak bola 4, position='identity') + scale_fill_manual (values=c ('red', 'blue', 'purple')) This particular example creates a plot with three overlaid histograms that are red, blue, and . download one piece 484