[R] several plots on several pages

[Rainer M. Krug]

Hi

 > version
                _
platform       i686-pc-linux-gnu
arch           i686
os             linux-gnu
system         i686, linux-gnu
status
major          2
minor          5.1
year           2007
month          06
day            27
svn rev        42083
language       R
version.string R version 2.5.1 (2007-06-27)



I want to create a pdf withe three graphs on a page and with two pages:

-------------
|     1     |
-------------
|     2     |
-------------
|     3     |
-------------

NEW PAGE

-------------
|     4     |
-------------
|     5     |
-------------
|     6     |
-------------

Graph 1 should ALWAYS be at that spot, graph two also, even if graph one 
produces an error when plotting (the area can be empty, but doesn't have 
to.)

I produced the foolowing code below, but I have a few problems:

1) how can I create a new page in the pdf?

2) how can I make sure that the second graph is in position 2 when graph 
one produces an error when plotting I(as in the example)? Everything 
works OK (for the firsat page) when graph one is plotted.

I have the feeling, that I am thinking to complicated.

Any help welcome,

Rainer


pdf("test.pdf")
try(
     {
     ## Set layout to three rows and only oine column
     par( mfcol=c(3,1), oma=c(0,0,0,0), mar=c(4, 4, 2, 2) )

     ## First row
     par(mfg=c(1,1))
     try( plot(runif(ff)) )

     ## Second row
     par(mfg=c(2,1))
     try( plot(runif(100)) )

     ## Third row
     par(mfg=c(3,1))
     plot(runif(1000))


     ## THE NEXT THREE SHOULD BE ON A NEW PAGE IN THE PDF

     ## Set layout to three rows and only oine column
     par( mfcol=c(3,1), oma=c(0,0,0,0), mar=c(4, 4, 2, 2) )

     ## First row
     par(mfg=c(1,1))
     try( plot(runif(ff)) )

     ## Second row
     par(mfg=c(2,1))
     try( plot(runif(100)) )

     ## Third row
     par(mfg=c(3,1))
     plot(runif(1000))

     }
     )
dev.off()


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Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
Biology (UCT)

Plant Conservation Unit
Department of Botany
University of Cape Town
Rondebosch 7701
South Africa

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       	Rainer at krugs.de