Re: [Maxima-discuss] Fatal error

[Stavros M. (Σ. Μ. <mac...@al...>]

Gunter, in what version of Maxima does your solution work?

Maxima 5.41.0a_dirty http://maxima.sourceforge.net
using Lisp SBCL 1.3.18
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) load(drawdf);

(%o1)
E:/maxima-5.41.0a/bin/../share/maxima/5.41.0a_dirty/share/diffequations/\
drawdf.mac
(%i2) drawdf([y,-9*sin(x)-y/5], [x,-10,10], [y,-10,10], tstep=0.05,
              soln_arrows=true, point_size=0.5,
              points_at([0,0], [2*%pi,0], [-2*%pi,0]),
              field_degree='solns,
              saddles_at([%pi,0], [-%pi,0]));

ÿ%
fatal error encountered in SBCL pid 2684(tid 0000000001356500):
%PRIMITIVE HALT called; the party is over.


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On Mon, Jun 4, 2018 at 12:44 PM, Gunter Königsmann <gu...@pe...>
wrote:

>
>
> On 04.06.2018 18:37, Sergio Sanz Hernández via Maxima-discuss wrote:
> > drawdf([y,-9*sin(x)-y/5], tstep=0.05,
> >               soln_arrows=true, point_size=0.5,
> >               points_at([0,0], [2*%pi,0], [-2*%pi,0]),
> >               field_degree='solns,
> >               saddles_at([%pi,0], [-%pi,0]));
>
> My guess is that x and y are undefined unless you replace the
>
> [y,-9*sin(x)-y/5]
>
> by a
>
> [y,-9*sin(x)-y/5], [x,-10,10], [y,-10,10]
>
> Kind regards,
>
>  Gunter.
>
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