我的代码如下,我想更改ggplot的标签,但R总是提醒我:
Error in unit(tic_pos.c, "mm") : 'x' and 'units' must have length > 0
我该怎么办？
ggplot(mat,aes(x=sales,col=type))+
geom_density()+labels("red_sold","blue_sold","yellow_sold")