geom_point大小的图例单位

Question

我在ggplot2中使用geom_point将值显示为每个点的区域：

geom_point(aes(size = sqrt(z/pi))

但是，图例单位是变换后的值，是否可以让图例显示原始值以及各自的气泡大小？

编辑：抱歉，我应该提供更多信息，以

开头

library(ggplot2)

data <- data.frame(x = sample(1:10), y = sample(1:10), z = sample(1:10), colour = c("red", "yellow", "green","pink","black","brown","grey","white","purple","beige"))

ggplot(data, aes(x = x, y = y)) + geom_point(aes(size = sqrt(z/pi)), pch = 21) + aes(fill = colour) + scale_fill_brewer(palette = "set1")

Answer 1

尝试添加：

+scale_colour_manual(guide = guide_legend(override.aes=aes(size=values)))