suppose I'm plotting a dataframe in ggplot2 like:
ggplot(iris) + geom_point(aes(x=Sepal.Width, y=Sepal.Length, color=Species, size=Sepal.Length))
two related questions:
how can I remove a variable altogether from the legend? For example, still size the points by Sepal.Length
but remove Sepal.Length
from the legend altogether?
how can I remove just a certain value or set of values from the legend? For example, still color the points by Species as above, but in the legend only show the value for setosa
and exclude versicolor, virginica
?
thanks.
正如joran所说,请使用scale_size(guide = "none")
。
scale_color_discrete(breaks="setosa")
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