Recording vectors in for loop, when the loop is running in a range starting with negative numbers

I'm trying to record values of cn during a for loop, but I can't seem to index into a vector x using the value for the iteration, because my for loop is running from values -50:50. So It cant index into x at x(1,n). I have no idea how to solve this. Does anyone have any suggestions? Thank you!

clear; clc, clf;

t = 0:0.01:20;
A=2;
T=5;
wo = 2*pi()/T;
nmax = 50;
x = zeros(1,length(-nmax : 1 : nmax));

for n = -nmax : 1 : nmax;
    if n ~=0
        cn =  (A/ (T*-1i*n*wo) ) * (exp(-1i*n*wo*T/2)-1);
    else
        cn =  A/2;
    end
    x(1,n) = cn;
end

Answer 1

[Stephen23]

Data are not indices, do not mix them up.

V = -nmax:1:nmax; % data!!!!
for k = 1:numel(V) % indices!!!!!
    n = V(k); % data!!!!
    if n ~=0
        cn =  (A/ (T*-1i*n*wo) ) * (exp(-1i*n*wo*T/2)-1);
    else
        cn =  A/2;
    end
    x(1,k) = cn; % index!!!!
end

[Ben Robson]

Brilliant thank you. I'd confused myself becuase in previous examples, the data was the same as the indices. Very good lesson. Thanks!