[R] Histogram with colors according to factor

[ONKELINX, Thierry]

Is this what you want?

dataset <- data.frame(x = c(rnorm(100), runif(100), rchisq(100, 1)), y =
gl(3, 100, labels = LETTERS[1:3]))
ggplot(dataset, aes(x = x, fill = y)) + geom_histogram()
ggplot(dataset, aes(x = x, fill = y)) + geom_histogram(position =
"dodge")

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 

To call in the statistician after the experiment is done may be no more
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 Hans W. Borchers
Verzonden: dinsdag 8 juli 2008 13:23
Aan: r-help op r-project.org
Onderwerp: [R] Histogram with colors according to factor


Given a data frame with a continuous variable and a factor. I would like
to
generate a histogram of the continuous variable, where each bar is
filled
with different colors according to the percentage of factor values
falling
into this region of the continuous variable.

I looked into packages like 'lattice' and 'ggplot2'. Searching R-help
revealed that 'histogram' is spelled 'histogramm' in almost 2% of the
time.  I now know how to color whole bars, but did not find a solution
for this specific kind of visualization.

Many thanks in advance,  Hans Werner Borchers

----
Hans W. Borchers
ABB Corporate Research

-----
----
Hans W. Borchers
ABB Corporate Research Germany
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