[R] ggplot2: histogram with proportions (or %)

[ONKELINX, Thierry]

Dear Bernd,

AFAIK you can only get counts, densitys, counts scale to a maximum of 1
and likewise densitys. But you can alter the labels on the scales
manually.

library(ggplot2)
dataset <- data.frame(x = rnorm(1000))
ggplot(dataset, aes(x = x)) + stat_bin(aes(y = ..ncount..))
ggplot(dataset, aes(x = x)) + geom_histogram() +
scale_y_continuous(breaks = seq(0, 90, by = 10), labels = paste(seq(0,
90, by = 10) / 1000, "%", sep = ""))

HTH,

Thierry


------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature
and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium 
tel. + 32 54/436 185
Thierry.Onkelinx op inbo.be 
www.inbo.be 

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than asking him to perform a post-mortem examination: he may be able to
say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of
data.
~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces op r-project.org [mailto:r-help-bounces op r-project.org]
Namens Bernd Weiss
Verzonden: donderdag 30 oktober 2008 9:31
Aan: r-help op r-project.org
Onderwerp: [R] ggplot2: histogram with proportions (or %)

Dear all (Hadley, Thierry :-),

I was wondering how to force ggplot/qplot(... geom="histogram") to plot 
proportions (or %) instead of counts/densities.

Thanks for your help,

Bernd

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