pstricks and inputs

[Richard Hensh]

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Someone else suggested the same thing and I'm still having problems so I
better include all of the code:


\def\axes#1 {
\begin{pspicture}*(\xmin,\ymin)(\xmax,\ymax)\showgrid

\psline[linewidth=1pt,linecolor=gray,arrowinset=0.6,arrowsize=1.5pt
3]{<->}(\xmin,0)(\xmax,0)
\psline[linewidth=1pt,linecolor=gray,arrowinset=0.6,arrowsize=1.5pt
3]{<->}(0,\ymin)(0,\ymax)
\psaxes[Ox=\xmin% ,Oy=\ymin%
       ,ticks=none%
       ,tickstyle=top%
       ,linewidth=0.25pt
       ,axesstyle=frame](\xmin,\ymin)(\xmax,\ymax)

\psclip{\psframe(\xmin,\ymin)(\xmax,\ymax)}
	\expandafter\psline#1
\endpsclip
\end{pspicture}
}


Now when I try to call

\def\opairs{(-5,1)(-3,2)(-2,0)}
\expandafter\axes{\opairs}

I get:

! Bad arrows specification: (-5,1)(-3,2)(-2,0).
\@pstrickserr ...te help.}\errmessage {#1}
                                          \endgroup
l.203 \expandafter\axes{\opairs}


I've tried to call the \axes macros several differnet ways with no success.
Follow-up question, the following worked (outside the \axes macro above):

\def\mypoints{(0,0)(1,1)}
\expandafter\psline\mypoints


But this does not. Why would parameters give me problems here?

\def\mypoints{(0,0)(1,1)}
\expandafter\psline[linewidth=1.5pt,etc.]\mypoints


thanks
ricky








-----Original Message-----
From: Michael J. Sharpe [mailto:msharpe at euclid.UCSD.EDU]
Sent: Friday, September 24, 1999 1:28 PM
To: pstricks at tug.org
Cc: hensh at math.msu.edu
Subject: Re: pstricks and inputs


Denis doesn't seem to be jumping on this, so I'll take a stab. If you
want to use a macro for the (entire) list of parameters, you must do
it making use of \expandafter, as in

\def\mypoints{(0,0)(1,1)}
\expandafter\psline\mypoints

otherwise\mypoints is not expanded before the parameter-reading
apparatus gets to work. This seems to work even with  parameters
included within braces, as for example in

\def\mypoints{*[linewidth=3pt]{->}(0,0)(1,1)}
\expandafter\psline\mypoints

Michael Sharpe

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>This is the PSTricks mailing list, devoted to discussions about
computational
>graphics in (La)TeX using the PSTricks package from Timothy van Zandt.
>For help using this mailing list, see instructions at the end of message.
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>
>Can some one tell why the following generates an error?
>
>\def\mypoints{(0,0)(1,1)}
>\psline\mypoints
>
>while this one works
>
>\psline(0,0)(1,1)
>
>??
>
>thanks
>ricky
>
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