[R] printing R generated postcript files

[Alex Nu]

 getOption("papersize")  resulted in A4

 I tried to set it to letter  modifying
 /etc/R/Renviron

 as suggested by Dirk,

R_PAPERSIZE=${R_PAPERSIZE-$(cat /etc/papersize)}

 but this is what I get when trying to generate
 a postscript file

Error in postscript("times.ps") : invalid page type
``cat /etc/papersize`' (postscript)

Meanwhile I manually  set to letter.

 thanks

Alex