3

For example:

require(ggplot2)
require(reshape2)
volcano3d <- melt(volcano) 
names(volcano3d) <- c("x", "y", "z") 
v <- ggplot(volcano3d, aes(x, y, z = z)) 
v1 = v +  stat_contour(aes(colour=..level..,size=..level..))

enter image description here

There are two legends on the side, can I remove one of them?

qed
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1 Answers1

7

See here: http://www.cookbook-r.com/Graphs/Legends_(ggplot2)/

The line you'll need is 

v1 = v +  stat_contour(aes(colour=..level..,size=..level..)) + 
scale_colour_continuous(guide=FALSE)

Use scale_size_continuous to turn off the size legend.

colcarroll
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