[R] Multiple hist(ograms) - One plot

[ONKELINX, Thierry]

Michael,

Use %in% to select multiple cases:

dat[dat$sc_recov %in% c(21, 31, 41), ] 


------------------------------------------------------------------------
----
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 Michael Just
Verzonden: donderdag 2 oktober 2008 10:59
Aan: r-help op r-project.org
CC: dieter.menne op menne-biomed.de
Onderwerp: Re: [R] Multiple hist(ograms) - One plot

Dieter Menne:
Thanks for the suggestion and link, it looks good. I think my trouble
now is
lack of basic R knowledge.

Cheers,
Michael

For example,

I tried:
histogram(~bbContag | sc_recov, data=dat)

This would work fine if I could select cases from sc_recov. How can I
select
more than one case? I know I can do:

sc_recov.21 <- dat[dat$sc_recov=21,]

but how could I select all cases where sc_recov = 21, 31 or 41?


On Thu, Oct 2, 2008 at 3:33 AM, Michael Just <mgjust op gmail.com> wrote:

> Hello,
> If I use:
>
> p <- ggplot(dat, aes(x=bbContag, y=..density..)) + geom_histogram()
>
> and then:
>
> p + facet_grid(. ~ sc_recov)
>
> Its a little crazy because I have 48 different values in 'sc_recov'.
> Instead I want to select cases from 'sc_recov' and only use three at a
time:
>
> I tried:
> > p + facet_grid(sc_recov=="21" ~.)
> Error in check_formula(formula, varnames) :
>   Formula contains variables not in list of known variables
>
> How can I select cases?
>
> Any ideas or suggestions?
> Thanks,
> M Just
>
> On Thu, Oct 2, 2008 at 2:42 AM, ONKELINX, Thierry <
> Thierry.ONKELINX op inbo.be> wrote:
>
>> Dear Michael,
>>
>> Try ggplot2. Use something like
>>
>> install.packages("ggplot2")
>> library(ggplot2)
>> 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(. ~
>> recov)
>> 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/
>>
>> 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 Michael Just
>> Verzonden: donderdag 2 oktober 2008 7:29
>> Aan: r-help op r-project.org
>> Onderwerp: [R] Multiple hist(ograms) - One plot
>>
>> Hello,
>> I am trying to plot multiple histograms with the same scales, etc
into
>> one
>> plot. The commands below produce a 3 page PDF with each histogram
>> occupying
>> the upper right quadrant. And use slightly different scales on the X
and
>> Y
>> axes.
>>
>> > 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
>>
>>         [[alternative HTML version deleted]]
>>
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>
>

	[[alternative HTML version deleted]]

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and provide commented, minimal, self-contained, reproducible code.

Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer 
en binden het INBO onder geen enkel beding, zolang dit bericht niet bevestigd is
door een geldig ondertekend document. The views expressed in  this message 
and any annex are purely those of the writer and may not be regarded as stating 
an official position of INBO, as long as the message is not confirmed by a duly 
signed document.