I am trying to define a vector xdd in terms of another vector x but when I define elements of the vector xdd in terms of the corresponding elements of x I get the error
Unable to convert expression containing symbolic variables into double array. Apply 'subs' function first
to substitute values for variables.
Can someone please suggest a way to solve this problem?
syms x1 x2 s t
x = [x1; x2];
xdd = ;
for i = 1:length(x0)
xdd(i) = s^2*x(i) + 2*sin(t)