stat_bin should handle a number of bins in addition to binwidth and breaks

[jiho]

Use case: when plotting the histograms of several variables at once, the user wants some control over the fineness of the breaks but cannot provide breaks of binwidth because the units of the variables are very different.

library(ggplot2)
d = data.frame(id=1:100, a=runif(100), b=runif(100)*20, c=runif(100)-10)
d = melt(d, id="id")
ggplot(d) + geom_bar(aes(x=value)) + facet_wrap(~variable, scales="free")

[hadley]

Will be done as part of densityVis package.

[hadley]

This sounds like a great feature, but unfortunately we don't currently have the development bandwidth to support it. If you'd like to submit a pull request that implements this feature, please follow the instructions in the development vignette.

[krlmlr]

Would a pull request that offers a bincount parameter make it into 1.0? Thanks for considering.

[hadley]

No, it's too late now. I need to fix the last R CMD problem and then start publicising the release candidate.

[krlmlr]

OK. Anyway, it should probably be bins, as in stat_contour.