

   PPoossttSSccrriipptt GGrraapphhiiccss

        postscript(file = "Rplots.ps", paper, horizontal, width, height,
                family, pointsize, bg, fg)
        ps.options(paper, horizontal, width, height, family, pointsize, bg, fg)

   AArrgguummeennttss::

       file: a character string giving the name of a file to
             print to.

      paper: the size of paper in the printer.  The choices are
             `"a4"', `"letter"', `"legal"' and `"executive"'.

   horizontal: the orientation of the printed image, a logical.

   width,height: the width, and height of the graphics region
             in inches.  The default is to use the entire page.

     family: the font family to be used.  This must be one of
             `"AvantGarde"', `"Bookman"', `"Courier"', `"Hel-
             vetica"', `"Helvetica-Narrow"', `"NewCentu-
             rySchoolbook"', `"Palatino"' or `"Times"'.

   pointsize: the default point size to be used.

         bg: the default background color to be used.

         fg: the default foreground color to be used.

   DDeessccrriippttiioonn::

        `postscript' start the graphics device driver for pro-
        ducing PostScript graphics.  The file `file' is opened
        and the PostScript commands needed to plot any graphics
        requested are stored in that file.  This file can then
        be printed on a suitable device to obtain hard copy.

        The auxiliary function `ps.options' can be used to set
        and view (if called without arguments) default values
        for the arguments to `postscript'.

        The postscript produced by is EPS (Encapsulated
        PostScript) compatible, and can be included into other
        documents, e.g. into LaTeX, using `\epsfig{file=<file-
        name>}'.

   SSeeee AAllssoo::

        `x11', `macintosh', `Devices'.

   EExxaammpplleess::

        # open the file "foo.ps" for graphics output
        postscript("foo.ps")

        plot(xx,yy)# produce the desired graph(s)
        ## dev.off()# turn off the postscript device

