Undefined function 'mtimes' for input arguments of type 'struct'.

Hello! Please I need a help here? Here is my script

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% x=[1 1.2 1.3 1.4 1.5];

A=[-1.3 -0.6; -0.5 -0.6];

Ad=[0.1 0; 0.1 0.1];

s=[0;0]; alpha=0.5; t1=0.1; x_tau_d=[0.7;0.6];

for k=0:0.01:1000

    fun1=@(tau,y) (t1-tau).^(k+1).*x_tau_d(1);
    fun2=@(tau,y) (t1-tau).^(k+1).*x_tau_d(2);
    s = s  +  [ode45(fun1,[0 t1],0);ode45(fun2,[0 t1],0)];

end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Thanks,

[Jan]

Please post the complete error message, such that we do not have to guess the line, which causes the error.

Answer 1

[Alexandra Harkai]

This gave me a different error in the first loop:

Undefined operator '+' for input arguments of type 'struct'.

Which is coming from the fact that the result of ode45() is a struct array with a few fields. Then the arithmetics won't make sense on a struct. You can pick the solutions you need from there:

sol1 = ode45(fun1,[0 t1],0); sol2 = ode45(fun2,[0 t1],0);
s = s  +  [sol1.y; sol2.y];