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[Maxima-discuss] Fw: Re: Fatal error
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From: Sergio S. H. <ser...@ya...> - 2018-06-04 21:18:30
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Hello:It's an example from the manual and I didn't realize they missed the definition of the variables.Thank you for your help. It works fine now.
Sergio Sanz.
En lunes, 4 de junio de 2018 18:46:06 CEST, Gunter Königsmann <gu...@pe...> escribió:
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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