With MATLAB it is always much simpler and more versatile to loop over indices, rather than looping over data. When you do that, then your task also becomes trivial by using indexing into the output variable. Note that:
- matrix A does not change in the loop, so should be moved byfore the loop.
- it adjusts the number of iterations automatically to the number of elements in V.
A = [-2 1,2,0,0,0;0,0,-2,1,2,0;0,0,0,0,-2,3;1,1,0,0,0,0;0,-1,1,1,0,0;0,0,0,-1,1,1];
V = 5:15/199:20;
N = numel(V);
Q = zeros(1,N); % preallocate output array!
for k = 1:N
b = [0;0;0;V(k);0;0];
x = A\b;
Q(k) = x(1);
end
And checking:
>> Q(:)
ans =
2.5294
2.5675
2.6057
2.6438
2.6819
2.7201
2.7582
2.7963
2.8345
2.8726
... more rows here
9.7745
9.8126
9.8507
9.8889
9.9270
9.9651
10.0033
10.0414
10.0795
10.1176
