That's great! Thank you all!!

Final question: how can I edit permanently the .ps.prolog? Is the .First()
function an option?

Please, tell me every detail as I am a total dumb!

Many thanks

Gaetano

On Fri, Jul 22, 2011 at 11:27 AM, Ted Harding <ted.harding@wlandres.net>wrote:

> On 22-Jul-11 09:20:23, peter dalgaard wrote:
> >
> > On Jul 22, 2011, at 11:08 , (Ted Harding) wrote:
> >
> >> On 22-Jul-11 08:02:40, peter dalgaard wrote:
> >>> [much snip]
> >>>
> >>> The .ps.prolog is not in C code but in an R character vector.
> >>
> >> While '?postscript' says (uder "Details:"):
> >>
> >>
> >>  Most of the PostScript prologue used is taken from the
> >>  R character vector '.ps.prolog'.  This is marked in the
> >>  output, and can be changed by changing that vector.
> >>  (This is only advisable for PostScript experts: the
> >>  standard version is in ?namespace:grDevices?.)
> >>
> >> I have not been able to get my hands on that vector in an
> >> R session. What is the incantation for locating it, please?
> >
> > grDevices:::.ps.prolog
> >
> > as in:
> >
> > .ps.prolog <- grDevices:::.ps.prolog
> > .ps.prolog[39] <- "/setrgb { setrgbcolor } def"
> > postscript()
> > image(volcano)
> > dev.off()
> >
> > --
> > Peter Dalgaard
>
> Ah, thanks! I wasn't using sufficiently many ":"'s!
> Apologies for the fumble.
> Ted.
>
> --------------------------------------------------------------------
> E-Mail: (Ted Harding) <ted.harding@wlandres.net>
> Fax-to-email: +44 (0)870 094 0861
> Date: 22-Jul-11                                       Time: 10:27:37
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