Ggplot - Bars, rectangles with bases on x-axis (Geom_bar)
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About
A bar geom makes the height of the bar proportional to:
- the number of cases in each group (default)
- or the sum of a column (using the weight aesthetic)
The geom_bar layer is used to produce 1d area plots:
- bar charts for categorical x,
- and histograms for continuous y.
geom_col() = geom_bar(stat="identity")
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Support
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.