On Wed, 8 Sep 1999, Mitsuru Oka wrote:
>
> Hello,
>
> I'm currently using R-0.65.0 with --gnome option in
> configure on IRIX64 and Debian GNU/Linux.
>
> I found a problem in generated postscript file which
> has following sequence:
>
> x <- 1:30
> postscript("output.ps")
> par(mfg=c(1,1,2,2))
> plot(x,sin(x))
> plot(x,sin(x))
> plot(x,sin(x))
> plot(x,sin(x))
> dev.off()
>
> The generated postscript file "output.ps" can't be
> interpreted by Aladdin Ghostscript 5.10.
>
> Error: /undefined in ps
> Operand stack:
> (0) 0.5 0.0
> Execution stack:
> %interp_exit .runexec2 --nostringval-- --nostringval--
--nostringval-- 2 %stopped_push --nostringval-- 2 3 %oparray_pop
--nostringval-- --nostringval-- false 1 %stopped_push 1 3
%oparray_pop .runexec2 --nostringval-- --nostringval-- --nostringval--
2 %stopped_push --nostringval-- --nostringval-- --nostringval--
--nostringval-- 5 3 %oparray_pop
> Dictionary stack:
> --dict:781/809-- --dict:0/20-- --dict:89/200--
> Current allocation mode is local
> Current file position is 3092
>
>
> What is a problem in my program or R?
Your R code, primarily.
I get that error too. But you need
x <- 1:30
par(mfcol=c(2,2))
plot(x,sin(x))
....
As?par says
mfg: A numerical vector of the form `c(i, j, nr, nc)'
where `i' and `j' indicate which figure in an
`nr'-by-`nc' array of figures is currently being
drawn.
and you need to set up the array first, by setting parameter mfrow or
mfcol.
I have to say that this would be hard to really understand from the help
page, but it is quite clearly explaind in the recommended R documentation
(as both Rnotes and Venables & Ripley have the same original source for
this, Bill Venables).
S, which is being copied here, just draws 4 superimposed plots.
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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