how can i make the program to chose a random value of (w) ,, if (m) is matrix input

u=(t.*sin(3.*t)).^m;

w=diff(u,t,2);

dy1=diff(y,t,1);

dy2=diff(y,t,2);

y(t)=dsolve(dy2-(5*dy1)+(4*y)==randi(w),dy2(0)==0,dy1(0)==0,dy2==0,dy1(0)==0);

Answer 1

[Image Analyst]

Try randi():

randomIndex = randi(length(w), 1);
randomW = w(randomIndex);

or something like that.

[Mohammad Adeeb]

Warning: The number of equations exceeds the number of indeterminates. Trying heuristics to reduce to square system.

> In symengine (line 57)

In mupadengine/evalin (line 102)

In mupadengine/feval (line 158)

In dsolve>mupadDsolve (line 332)

In dsolve (line 193)

Warning: Explicit solution could not be found.

> In dsolve (line 201)

[Image Analyst]

I don't think that's related to choosing a random value from w.

[Mohammad Adeeb]

what can i do .. i have to do this assignment