52

Consider the example plot below. I'd like to make the little boxes around each of the symbols in the legend go away. How an I do this?

 ggplot(mtcars, aes(wt, mpg, shape=factor(cyl))) + geom_point() + theme_bw()

joran
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cboettig
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  • You may also go to http://wiki.stdout.org/rcookbook/Graphs/Legends%20(ggplot2)/ to see a list of options to modify legends. – Sam Jun 29 '12 at 23:21

1 Answers1

79

You're looking for:

 + opts(legend.key = theme_blank())

You can see lots of examples of all sorts of this stuff in ?opts. I couldn't remember off the top of my head which one it was, so I just tried a few until I got it right.

Note: Since version 0.9.2 opts has been replaced by theme:

+ theme(legend.key = element_blank())
joran
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