[R] bitmap .tif in colors

[Prof Brian Ripley]

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 <ligges at 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)"
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595