[OS X TeX] multido(?) error

[Nitecki, Zbigniew H.]

Yes—thanks.  I would never have found the mistake (it doesn’t look like an environment, and I just missed that in reading my model code).
Z

On May 1, 2020, at 1:48, Ross Moore <ross.moore at mq.edu.au<mailto:ross.moore at mq.edu.au>> wrote:

Hi Zbigniew,

On 1 May 2020, at 1:57 pm, Nitecki, Zbigniew H. <Zbigniew.Nitecki at tufts.edu<mailto:Zbigniew.Nitecki at tufts.edu>> wrote:

I’m trying to draw some phase portraits of 2nd order systems of o.d.e. using the pst-ode package.  I modelled my code after a more elaborate example
on stack exchange.
In the attached code, I get a “forgotten end group” error at line 48 (which reads \end{pspicture}), and if I persist (using r on the console) it tells me the
\begin{pspicture} on line 38 is ended by \end{document} on line 49.  I know my use of ODEsolve is correct, since with parameters entered directly
it works.

Aren’t you just missing the  \endpsclip  command.

This works fine for me:

\begin{pspicture}(-5.5,-5.5)(5.5,5.5)

\psclip{\psframe(-5.0,-5.0)(5.0,5.0)}%
%
  %plot the lines previously computed
  \multido{\ii=0+1}{20}{%
    \multido{\ij=0+1}{20}{%
      \listplot{line_\ii_\ij}%
}%
}
\endpsclip
\end{pspicture}

But there is a lot of output into the Console window.
(Not really a typesetting issue, but rather distracting!)



Could this have to do with my putting the output of ODEsolve in the file line_ii_ij (inside the top multido)?  I didn’t fully understand the first two
arguments in ODEsolve: the first is the output and the second apparently sets the mode of output (in the documentation the examples just give a name
to the output and use (0 1) for the mode of output).



Zbigniew Nitecki
Department of Mathematics
Tufts University
Medford, MA 02155

telephones:
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Hope this helps.
Stay safe.

Ross

Dr Ross Moore
Department of Mathematics and Statistics
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T: +61 2 9850 8955  |  F: +61 2 9850 8114
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