r legend麻烦，如何更改图例中的文字大小

Question

I think cex doesn't work. Cex will change the whole scale of the legend. But I just want to enlarge the text size. any command will help?

Answer 1

Yes!, set pt.cex = 1 and change cex as you want as in:

plot(c(1,1))
legend("topleft", "Legend", cex=1.3, pch=1, pt.cex = 1)

Answer 2

You can set the cex for the points separately from the rest of the legend. This would still make the box small, though. A more specific example of what you're trying to do might help. However, see if this solves your problem:

plot(rnorm(10))
legend("top", legend="test", pch=21) #everything is normal sized (cex=1 default from par())
legend("topleft", legend="test", pch=21, cex=0.5) #everything is small
legend("topright", legend="test", pch=21, pt.cex=1, cex=0.5) #the point is normal, but the rest is small

Best of luck :)