On Wed, 18 Feb 2009, Lauri Nikkinen wrote:

Thanks. I upgraded to R 2.8.1 and tried

tiff(filename = "volc.tif", width=600, height=400, compression =
"none", bg = "white", res = 300)
image(t(volcano)[ncol(volcano):1,])
dev.off()

but this produces error

Error in plot.new() : figure margins too large

How this should be modified to produce a decent-sized graph?

Well, thae is a 2" by 1.3" image, so the pointsize is way too large. Increase the dimensions or decrease the resolution or decreaase the pointsize.

(As a warning, there was a 'grid' bug that affected some versions of tiff, png etc in 2.8.0 and 2.8.1 when plotting lattice plots at non-default resolutions. The NEWS item is

    o   grid-based plots no longer reset the base text size to the
        default 96dpi in cairo-based bitmap devices.

for 2.8.1 patched.  But that produces too small not too large text.)


Regards,
Lauri

2009/2/18 Uwe Ligges <lig...@statistik.tu-dortmund.de>:


Lauri Nikkinen wrote:

Hello,

How to produce .tif graphic in colors using bitmap function?

e.g this produces figure in grayscale

bitmap(file="volc.tif", type = "tifflzw", res = 300)
image(t(volcano)[ncol(volcano):1,])
dev.off()

Why not upgrade R and use the tiff() device?

Uwe Ligges




I'm using Windows XP and ghostscript.

R.Version()

$platform
[1] "i386-pc-mingw32"

$arch
[1] "i386"

$os
[1] "mingw32"

$system
[1] "i386, mingw32"

$status
[1] ""

$major
[1] "2"

$minor
[1] "7.1"

$year
[1] "2008"

$month
[1] "06"

$day
[1] "23"

$`svn rev`
[1] "45970"

$language
[1] "R"

$version.string
[1] "R version 2.7.1 (2008-06-23)"

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Brian D. Ripley,                  rip...@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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