如何在ggplot中使點看起來更大

Question

ggplot(data_exp, aes(x = transaction, y = exp, size = count, colour = class, label = label)) + 
geom_point(alpha = 0.5) + 
geom_text(colour = "black", vjust = 0, nudge_y = 0.5, size = 3, fontface = "bold") 

我想讓圖中的點看起來更大，我試着讓大小變成count * 1000，但似乎沒有任何變化。

Answer 1

使用size在geom_point

一個例子審美;

library(ggplot2) 
data(mtcars) 
# increase point size based on variable value 
p <- ggplot(mtcars, aes(wt,mpg)) 
p + geom_point(aes(size=wt*100))