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Points shapes given by ggplot2 come from R base graphics. Another way to look at them is to enter ?pch in the console. Do not expect it to give you such a visual exemplification but rather a textual one.
Points shapes given by ggplot2 come from R base graphics. Another way to look at them is to enter ?pch in the console. Do not expect it to give you such a visual exemplification but rather a textual one.