dsolve unable to find symbolic solution to sets of ODE
8 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
RITIKA Jaiswal
le 19 Sep 2022
Commenté : RITIKA Jaiswal
le 19 Sep 2022
Hi all,
I have been trying my hand at matlab recently and encountered an error while attempting to solve an ordinary differential equation. The equation I am trying to solve is in the picture attached.
I am getting like this after running this code
clear all;
clc;
close all;
syms g(x) u(t) x1(t) x2(t) x3(t) x4(t) x5(t) x6(t) x7(t) x8(t) x9(t) x10(t);
g(x)=exp(40*x)+x-1;
A =[-g(x1)-g(x1-x2)+exp(-t); g(x1-x2)-g(x2-x3);g(x2-x3)-g(x3-x4);g(x3-x4)-g(x4-x5);g(x4-x5)-g(x5-x6);g(x5-x6)-g(x6-x7);g(x6-x7)-g(x7-x8);g(x7-x8)-g(x8-x9);g(x8-x9)-g(x9-x10);g(x9-x10)]
ode1 = diff(x1,t)==[-g(x1)-g(x1-x2)];
ode2= diff(x2,t)== g(x1-x2)-g(x2-x3);
ode3= diff(x3,t)== g(x2-x3)-g(x3-x4);
ode4= diff(x4,t)== g(x3-x4)-g(x4-x5);
ode5= diff(x5,t)== g(x4-x5)-g(x5-x6);
ode6= diff(x6,t)== g(x5-x6)-g(x6-x7);
ode7= diff(x7,t)== g(x6-x7)-g(x7-x8);
ode8= diff(x8,t)== g(x7-x8)-g(x8-x9);
ode9= diff(x9,t)== g(x8-x9)-g(x9-x10);
ode10= diff(x10,t)== g(x9-x10);
odes=[ode1;ode2;ode3;ode4;ode5;ode6;ode7;ode8;ode9;ode10]
S = dsolve(odes)
after running the code i am getting like this what should i do?
Warning: Unable to find symbolic solution.
> In dsolve (line 209)
In deexamp (line 18)
S =
[ empty sym ]
0 commentaires
Réponse acceptée
Torsten
le 19 Sep 2022
The equations are much too difficult and the size of your ODE system is much too large to be solved symbolically.
Use a numerical solver, e.g. ODE15S.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Symbolic Math Toolbox dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!