[R] Multiple hist(ograms) - One plot

ONKELINX, Thierry Thierry.ONKELINX at inbo.be
Thu Oct 2 09:42:21 CEST 2008

Dear Michael,

Try ggplot2. Use something like

recov <- 0:2
n <- 1000
all <- data.frame(bbED = rnorm(3 * n, mean = recov), recov =
factor(rep(recov, n)))
ggplot(data = all, aes(x = bbED)) + geom_histogram() + facet_grid(. ~
ggplot(data = all, aes(x = bbED)) + geom_histogram() + facet_grid(recov
~ .)
ggplot(data = all, aes(x = bbED, colour = recov)) + geom_density()

You'll find more information on ggplot2 at http://had.co.nz/ggplot2/



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
tel. + 32 54/436 185
Thierry.Onkelinx op 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

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ensure that a reasonable answer can be extracted from a given body of
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-----Oorspronkelijk bericht-----
Van: r-help-bounces op r-project.org [mailto:r-help-bounces op r-project.org]
Namens Michael Just
Verzonden: donderdag 2 oktober 2008 7:29
Aan: r-help op r-project.org
Onderwerp: [R] Multiple hist(ograms) - One plot

I am trying to plot multiple histograms with the same scales, etc into
plot. The commands below produce a 3 page PDF with each histogram
the upper right quadrant. And use slightly different scales on the X and

> s21 <- dat[dat$sc_recov=="21",]
> s21.ED <- subset(s21, select=(bbED))
> s31 <- all[all$sc_recov=="31",]
> s31.ED <- subset(s31, select=(bbED))
> s41 <- all[all$sc_recov=="41",]
> s41.ED <- subset(s41, select=(bbED))
> pdf("234_1_ED.pdf")
> par(mfrow = c(2, 2), oma = c(0, 0, 2, 0))
> hist(s21.ED) + hist(s31.ED) + hist(s41.ED)
> dev.off()

Also, for example if I add something like col="x", or main="x" to the
hist(x, ...) nothing appears on the plot.  ?

Please advise,
Thank you kindly,
M Just

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