[R] suggestion: postscript paper=user

[Li Dongfeng]

Dear R developers and users,

  I have a suggestion for the postscript device driver.
Now the paer= option only support "a4", "letter",
"legal", "executive". I suggest we add a "user" option
and letter user provide paper size, even like "595x421",
width>height.

For printing purpose, the provided paper size are
nearly enought. But I need to use R to produce
a lot of graphics, and transform these graphics to
PNG format for web publication.  I use ghostscript
to do the transformation, but the default paper size of the
R postscript device is too big, and the orietation
is not correct(we need landscape). I don't know
how to make the image size smaller and
rotating 90 degrees with ghostscript.  I had to
patch the R source(src/unix/devPS.c)  myself
to add a paper size. If R provide a paper="user "
option for the postscript device, things would be
much easier.

Li Dongfeng


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