dsolve unable to find symbolic solution to sets of ODE
9 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
RITIKA Jaiswal
el 19 de Sept. de 2022
Comentada: RITIKA Jaiswal
el 19 de Sept. de 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 comentarios
Respuesta aceptada
Torsten
el 19 de Sept. de 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.
Más respuestas (0)
Ver también
Categorías
Más información sobre Symbolic Math Toolbox en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!