MATLAB: Function itself does not work but each part on its own does

function

Hi all. I just started programming in MatLab and faced the problem that the following function does not work but running each part on its own surprisingly does. Any help?
function w = we(index, maturity, tenorDate) %weights
          helper= cumprod(1./(1+rates(maturity:tenorDate-1)));
          nom   = helper(index-maturity+1);
          denom = cumsum(helper);
          w     = nom./denom(tenorDate-maturity);
end
whereby:
index = [6     7     8     9    10];
maturity= 6;
tenorDate=11;
rates = [0.0299 0.0366 0.0410 0.0444 0.0475 0.0497 0.0514 0.0522 0.0530 0.0540]'
Thanks a lot

Best Answer

You haven't included rates as an input to the function.
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