Warning: Using size for a discrete variable is not advised.
ggplot에서 number가 아닌 변수를 size에 사용했을때 warning
data
df <- data.frame(y=1:5, x=1:5, f=factor(1:5))
y x f 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5
plot
p <- ggplot(df, aes(x=x, y=y, color=f, size=f, shape =f))+ geom_point()
Warning message: Using size for a discrete variable is not advised
==>
p <- ggplot(df, aes(x=x, y=y, color=f, size=as.numeric(f), shape =f))+ geom_point()
