ode45,Too many output arguments error

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Gloria
Gloria on 23 Mar 2022
Commented: Gloria on 23 Mar 2022
The equation is complex , I can not get the solution, how can I solve it?

Accepted Answer

Jan
Jan on 23 Mar 2022
Edited: Jan on 23 Mar 2022
The complete error message is (remember to include it in a question, whenever an error occurs):
Error using vertcat
The following error occurred converting from double to function_handle:
Too many output arguments.

Error in solution>mart (line 123)
F = [m(1)*e(1)*w^2*cwt+c(1)*e(1)*w*swt-c(1)*e(2)*w*swt-k(1)*e(1)*cwt+k(1)*e(2)*cwt+Fz(t)

Error in odearguments (line 92)
f0 = ode(t0,y0,args{:}); % ODE15I sets args{1} to yp0.

Error in ode23 (line 106)
odearguments(odeIsFuncHandle, odeTreatAsMFile, solver_name, ode, tspan, y0, options, varargin);
The Problem occurs here:
function [du] = mart( t,u )
...
Mt=@(t) 9.6*sin(w*t);
...
F = [m(1)*e(1)*w^2*cwt+c(1)*e(1)*w*swt-c(1)*e(2)*w*swt-k(1)*e(1)*cwt+k(1)*e(2)*cwt+Fz(t)
m(2)*e(2)*w^2*cwt-c(1)*e(1)*w*swt+c(1)*e(2)*w*swt+c(2)*e(2)*w*swt-c(2)*e(3)*w*swt+k(1)*e(1)*cwt-k(1)*e(2)*cwt-k(2)*e(2)*cwt-k(2)*e(3)*cwt
m(3)*e(3)*w^2*cwt-c(2)*e(2)*w*swt+c(2)*e(3)*w*swt+c(3)*e(3)*w*swt-c(3)*e(4)*w*swt+k(2)*e(2)*cwt-k(2)*e(3)*cwt-k(3)*e(3)*cwt-k(3)*e(4)*cwt
m(4)*e(4)*w^2*cwt-c(3)*e(3)*w*swt+c(3)*e(4)*w*swt+c(4)*e(4)*w*swt-c(4)*e(5)*w*swt+k(3)*e(3)*cwt-k(3)*e(4)*cwt-k(4)*e(4)*cwt-k(4)*e(5)*cwt
m(5)*e(5)*w^2*swt+c(4)*e(4)*w*swt-c(4)*e(5)*w*swt-k(4)*e(4)*cwt+k(4)*e(5)*cwt
m(1)*e(1)*w^2*swt+c(1)*e(1)*w*swt-c(1)*e(2)*w*swt-k(1)*e(1)*cwt+k(1)*e(2)*cwt+Fy(t)
m(2)*e(2)*w^2*swt+c(1)*e(1)*w*cwt-c(1)*e(2)*w*cwt-c(2)*e(2)*w*cwt+c(2)*e(3)*w*cwt+k(1)*e(1)*swt-k(1)*e(2)*swt-k(2)*e(2)*swt+k(2)*e(3)*swt
m(3)*e(3)*w^2*swt+c(2)*e(2)*w*cwt-c(2)*e(3)*w*cwt-c(3)*e(3)*w*cwt+c(3)*e(4)*w*cwt+k(2)*e(2)*swt-k(2)*e(3)*swt-k(3)*e(3)*swt+k(3)*e(4)*swt
m(4)*e(4)*w^2*swt+c(3)*e(3)*w*cwt-c(3)*e(4)*w*cwt-c(4)*e(4)*w*cwt+c(4)*e(5)*w*cwt+k(3)*e(3)*swt-k(3)*e(4)*swt-k(4)*e(4)*swt+k(4)*e(5)*swt
m(5)*e(5)*w^2*swt+c(4)*e(4)*w*swt-c(4)*e(5)*w*swt-k(4)*e(4)*cwt+k(4)*e(5)*cwt
Mt % <== here! Mt is a function handle and needs an argument
0
0
0
0];
Maybe you mean Mt(t).
  2 Comments
Gloria
Gloria on 23 Mar 2022
Thank you so much, I though the problem was caused by the matrix size

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