我想使用ggplot2
注释每个 boxplot 的平均值。但是,我无法弄清楚如何水平居中标记各自框中的手段的符号(见下图)。
MWE 如下供参考:
library(ggplot2)
ggplot(data=mpg, mapping=aes(x=class, y=hwy)) +
geom_boxplot(aes(color = drv), outlier.shape = NA) +
stat_summary(fun.y = mean, geom = "point", size=2, aes(shape = drv, color = drv)) +
theme_bw()
8
Try with
position_dodge()
ggplot(data=mpg, mapping=aes(x=class, y=hwy)) +
geom_boxplot(aes(color = drv), outlier.shape = NA) +
stat_summary(fun.y = mean, geom = "point", size=2, aes(shape = drv, color = drv),
position = position_dodge(width = .75)) +
theme_bw()
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