[R] Unexpected mfrow, layout behavior (pdf still has multiple pages)

[Paul Johnston]

You are correct, thank you. I added a new subsection 'Graphics
Devices' in http://wiki.r-project.org/rwiki/doku.php?id=tips:surprises:traps
to document this behavior.

Paul

On Thu, Feb 5, 2009 at 4:58 AM, Peter Dalgaard <P.Dalgaard at biostat.ku.dk> wrote:
> Paul Johnston wrote:
>> My goal is to create a graph with one column and three rows into a
>> single graphic. The mfrow, mfcol, and layout functions all have the
>> same effect: three graphs are produced in a single pdf file, having
>> one graph per page.  This is not what I want (I didn't want multiple
>> pages).  Just before I sent this post, I was able to generate the
>> desired output with split.screen.  Is this the expected behavior of
>> mfrow and layout?
>
> If you call them before opening the device, then yes, they will not
> affect that device, but presumably some other device...
>
>        -p
>
>>
>> Paul
>>
>> --------------------------------
>>
>> My code is as follows (ToruosityPlot and DiameterPlot are essentially
>> identical to LDRPlot).
>>
>> layout(matrix(1:3, ncol=1))
>> #par(mfrow=c(3,1))
>>
>> pdf("results.pdf", width=4, height=3, pointsize=4, colormodel="cmyk",
>> onefile=TRUE)
>>
>> TortuosityPlot(left, right)
>> DiameterPlot(left, right)
>> LDRPlot(left, right)
>>
>> dev.off()
>>
>> LDRPlot <- function(left, right)
>>   {
>>     plot(left$x, left$LDR, bty="n", ann=FALSE, xlim=c(-1500, 1000),
>> ylim=c(1.0, 1.5))
>>     abline(v=0, col=gray(.90))
>>     lines(left$x, left$LDR, col="green4", lty="solid")
>>     points(left$x, left$LDR, bg="limegreen", pch=21)
>>     lines(right$x, right$LDR, col="blue4", lty="dashed")
>>     points(right$x, right$LDR, bg="blue", pch=21)
>>     #title(main="LDR", xlab="Distance (um)", ylab="LDR",
>> col.main="black", col.lab=gray(.4), cex.main=1.2, cex.lab=1.0,
>> font.main=4, font.lab=3)
>>   }
>>
>>
>> platform       i386-apple-darwin8.11.1
>> arch           i386
>> os             darwin8.11.1
>> system         i386, darwin8.11.1
>> status
>> major          2
>> minor          8.1
>> year           2008
>> month          12
>> day            22
>> svn rev        47281
>> language       R
>> version.string R version 2.8.1 (2008-12-22)
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>
> --
>   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
>  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
>  (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45) 35327918
> ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)              FAX: (+45) 35327907
>
>