[pstricks] Using ps code in psplot's limits
Alan Ristow
ristow at ece.gatech.edu
Fri Mar 7 22:38:45 CET 2008
Hubert Lam wrote:
> Given that the usage of \psplot (excluding options) is
>
> \psplot{x_min}{x_max}{PS code for function}
>
>
> is there a mechanism that I'm not aware of that will allow the effects
> of this:
>
> \usepackage{pstricks,pst-math}
> \def\PiFour{PI 4 div}
> \psplot{0}{\PiFour}{x SIN}
Yes. I suppose there's more than one way to do it, but the way I would
do this is (untested):
\usepackage{pstricks,pst-math}
\pstVerb{/PiFour PI 4 div def}
\psplot{0}{!PiFour}{x SIN}
The "!" tells \psplot to use raw postscript code to compute the max
value. For that matter, you ought to be able to do (again, untested):
\usepackage{pstricks,pst-math}
\psplot{0}{!PI 4 div}{x SIN}
(I'm assuming PI and SIN are defined in pst-math -- I don't use that
package myself.)
Alan
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