Sorry about late response but I was traveling and did not follow R-Help for
2 weeks.
I think, I prefer to leave read/write.GIF functions in my package where I
have a full control of IO formats. I like to store images as integer or real
matrices, and movies as 3D arrays. I believe that 'pixmap' package (as well
as 'rimage' package and possibly others) use specialized classes for images
, and do not handle movies at all (correct me if I am wrong).
If you would like to add capability reading and writing GIF files (or ENVI
files - another multi-frame file format - see read/write.ENVI) to the
'pixmap' class, feel free to write a shell around my function. With input in
correct range (0:255) and option scale='never', no processing will be done
to your data on the way in or out. Also, I am not planning on making any
changes to that function, unless bugs are found.
Regards,
Jarek
\===
Jarek Tuszynski, PhD. o / \
Science Applications International Corporation \__,|
(703) 676-4192 \
[EMAIL PROTECTED] `\
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Martin Maechler
Sent: Tuesday, July 19, 2005 2:53 AM
To: Tuszynski, Jaroslaw W.
Cc: ([EMAIL PROTECTED])
Subject: Re: [R] New functions supporting GIF file format in R
JarekT == Tuszynski, Jaroslaw W [EMAIL PROTECTED]
on Mon, 18 Jul 2005 16:00:43 -0400 writes:
JarekT Hi, A minor announcement. I just added two functions
JarekT for reading and writing GIF files to my caTools
JarekT package. Input and output is in the form of standard
JarekT R matrices or arrays, and standard R color-maps
JarekT (palettes). The functions can read and write both
JarekT regular GIF images, as well as, multi-frame animated
JarekT GIFs. Most of the work is done in C level code
JarekT (included), so functions do not use any external
JarekT libraries.
JarekT For more info and examples go to
JarekT http://cran.r-project.org/doc/packages/caTools.pdf
JarekT http://cran.r-project.org/doc/packages/caTools.pdf
JarekT and click GIF.
Wouldn't it make sense to donate these to the 'pixmap' package which is
dedicated to such objects and has been in place for a very long time?
Regards,
Martin
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