It would be nice to easily create horizontal PDF files for standard paper
sizes.  For example:
pdf(file, paper="default", horizontal=TRUE)

Currently (R 2.2.1) there is no 'horizontal' argument for the PDF driver.
It looks like the only way to create a horizontal PDF is to manually specify
width and height.  For example:
pdf(file, width=11, height=8.5)

Does this feature look useful?  If so, I may someday try to make the changes
(I rarely have the ability to build R).

If anyone else wants to make the change, the code for the PDF driver appears
to be in R-devel/src/library/grDevices/src/devPS.c

The changes should not be hard.  FYI...there is a 'horizontal' option for
the postscript driver.

Kevin Wright

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