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

[Peter Dalgaard]

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)
> 
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> 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