On 8/21/08, Mahery Raharinjatovo <[EMAIL PROTECTED]> wrote:

> J'ai besoin d'aide sur l'utilisation de maxima à propos de plot2d ,ode2,ic1
> j'ai defini auparavant l'équation eqn1,puis j'ai tapé
> ic1(ode2(eqn1,i,t),i=0,t=0) celà a marché mais qund je veux voir la courbe
> ,j'ai fait plot2d((ic1(ode2(eqn1,i,t),i=0,t=0)),[t,0,0.2])
> ceci ne donne rien.

Hello, sorry for writing in English, I can't write in French.

I assume that ic1 returns some expression like i = f(t) where f(t)
satisfies eqn1. To plot that, you need to extract the right-hand side
of the equation, by the function rhs. I think something like this
should work:

expr : ic1 (ode2 (eqn1, i, t), i=0, t=0);
plot2d (rhs (expr), [t, 0, 0.2]);

If that doesn't work, please tell us what is eqn1, and I will take
another look at the problem.

All the best

Robert Dodier

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