Effacer les filtres
Effacer les filtres

Plotting a result from dsolve

29 vues (au cours des 30 derniers jours)
Sergio Manzetti
Sergio Manzetti le 8 Août 2017
Hi, I'd like to add a plotting command for the result of
syms h g
h = 1
g = 4
dsolve('h^2*(D2v)+2*i*g*h*Dv-g^2=0','v(0)=x')
How can this be done?
Thanks

Réponse acceptée

Elizabeth Reese
Elizabeth Reese le 10 Août 2017
I am not sure what x is in this case, but you should be able to use fplot or fplot3 to plot the function. You may need to constrain it some more to eliminate the constant terms or define what x should be, but those are the functions that can take the output of dsolve and plot it. I have made a little example below based on the dsolve documentation example.
syms y(t) a b;
a = 1; b = 4;
eqn = diff(y,t,2) == a^2*y;
Dy = diff(y,t);
cond = [y(0)==b, Dy(0)==1];
ySol(t) = dsolve(eqn,cond);
fplot(ySol);
  1 commentaire
Shantanu Gupta
Shantanu Gupta le 6 Jan 2021
Is it possible to put the condition latter? How to plot in that case.

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