Array indices must be positive integers or logical values error

I am trying to perform the following on MATLAB

However, I keep getting the error which says "Array indices must be positive integers or logical values error"

Please help. Here's my code:

nT=0
for n=0:10000 %part 5
    beta=alpha*sqrt(1-((2*n)/N-1)^2);
    if abs(n)<= (N-1)/2
        syms k x
            Ibeta=1+symsum((((1/factorial(k))*(beta/2)^k)^2),k,1,Inf)
            Ialpha=1+symsum((((1/factorial(k))*(alpha/2)^k)^2),k,1,Inf)
            wk(nT)=Ibeta/Ialpha
            nT=nT+1;
       
    else
        wk(nT)=0
        nT=nT+1;
    end
    n=n+1;
end

THIS IS THE ERROR I GET:
Array indices must be positive integers or logical values.

Error in DSPproj (line 25)
            wk(nT)=Ibeta/Ialpha

Answer 1

[Walter Roberson]

You initialize nT to 0. You access wk(nT) but nT is still 0.

You need to move the increments of nT to before you use nT as indices.

[Hope Damogbe]

Ohh, doesnt initializing nT to 0 mean that in the first loop interation, I am setting a value for wk(0) in the wk array?

Because that's what I thought. Correct me if I'm wrong.

**Edit:

Actually I just realized to access the first element of the array I need to use index 1 ( wk(1) ). I was using C++ logic. Thank you for your help, it works now!

[Walter Roberson]

Yes, but array indices start at 1 in MATLAB. 0 is not a valid index in MATLAB.