changing legend label for barplot

[Andrew Redd]

using the example on the website as a reference.

library(ggplot2)
qplot(factor(cyl), data=mtcars, geom="bar", fill=factor(cyl))

How do I change the label of the legend?

Thanks,
Andrew

[David Kahle]

qplot(factor(cyl), data = mtcars, geom = 'bar', fill = factor(cyl)) +

  scale_fill_discrete('label here')

Cheers

david.

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[Scott Chamberlain]

Or:

ggplot(mtcars, aes(factor(cyl), fill=factor(cyl))) + geom_bar() + labs(fill="label here")

[Andrew Redd]

Thank you.  Are these documented somewhere?  I could not find it.

-Andrew

[David Kahle]

There is documentation for labs, if that's what you're looking for.  Just ?labs it.  Otherwise, the scales are also uniform with respect to legend naming conventions, in the sense that scale_[aesthetic] always (as I am thinking now) takes as a first argument the title of the legend which it will generate (if indeed it does generate one).  Check Hadley's webpage at http://had.co.nz/ggplot2/ for more info.

Hope it helps!

david.

On Jan 19, 2011, at 10:26 PM, Scott Chamberlain wrote:

I don't know of any documentation...

Scott