Ggplot - Bars, rectangles with bases on x-axis (Geom_bar)


A bar geom makes the height of the bar proportional to:

The geom_bar layer is used to produce 1d area plots:

geom_col() = geom_bar(stat="identity")


stat_count() must not be used with a y aesthetic.

geom_bar plots by default the number of case. If you want a sum, you need to used the weight aesthetic.

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