First, this is not what 'bitmap' is intended for. R has a pdf()
device, and on Macs quartz() can produce PDF: producing PostScript and
converting it to PDF is cumbersome and you have given us no indication
of why you did this (and it is not a good idea for other reasons: see
the last para of my reply).
You have experienced a design decision that ps2pdf copied from Acrobat
Distiller, which is auto-rotation of pages into PDF. It has puzzled
users many times over the years (including on R mailing lists), not
least as the defaults in gs were changed not long after I wrote
bitmap().
Auto-rotation is done by default page-by-page based on the orientation
of all of the text on the page, and in your examples the axis
labelling is the only text and is about half/half landscape and
portrait. In examples 1 and 3, the axis labeliing differs and the
decision is different.
AFAICS you have not told us your version of R (see the R posting guide
which asked for it), and there is a typo in some. Look for a line
like
" -dAutoRotatePages=/None",
in bitmap(). If it does not have a space after the first quote, edit
bitmap to add it: this should then suppress auto-rotation.
Finally, a technical point. Although type="pdfwrite" works, it does
not set up gs optimally for that conversion and so works less well
that simply producing PostScript and calling ps2pdf -- but you will
need to suppress auto-rotation there too.
On Tue, 16 Feb 2010, Andrej wrote:
Hi,
I encounter the problem using bitmap function to plot pdf type figures
in an array (calling mfrow function). Consider the following three
examples:
# Example 1
bitmap("test1.pdf", type="pdfwrite", units="mm", height=50, width=100)
par(mfrow=c(1,2))
plot(1:5)
plot(1:10)
dev.off()
# Example 2
pdf("test2.pdf",height=5,width=10)
par(mfrow=c(1,2))
plot(1:5)
plot(1:10)
dev.off()
# Example 3
bitmap("test3.pdf", type="pdfwrite", units="mm", height=50, width=100)
par(mfrow=c(1,2))
plot(rnorm(100))
plot(rnorm(100))
dev.off()
In Example1 the figure is roteted; this is not the case in the Example
3 where I call rnorm() function. Example 2 seems fine. The gs version
installed is:
gs -v
GPL Ghostscript 8.70 (2009-07-31)
Copyright (C) 2009 Artifex Software, Inc. All rights reserved.
Could somebody reproduce these examples and/or explain me why the
plots in the second example are rotated.
Thanks in advance.
Best, Andrej
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Brian D. Ripley, rip...@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 272866 (PA)
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