问题
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?
回答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)
回答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 :)
来源：https://stackoverflow.com/questions/16905535/r-legend-trouble-how-to-change-the-text-size-in-legend