problem with extra entries in a matrix!

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Ano
Ano on 22 May 2017
Edited: Stephen23 on 22 May 2017
Hello, I would like to fill a matrix but I have a problem in filling it, because I get some extra entries even though I have initialized my matrix to the required size. Please find the problematic loop bellow, and hope you can help, thank you.
year = 1;
i = 0;
Nbrtot = 6;
MyResults = zeros(Nbrtot, 1);
for l = 1:year
for nbrrepetiton = 0:l
for NoYes = [0 1]
for semester = [1 2]
i = i + 1;
MyResults(i) = i;
end
end
end
end
Note: using this code My matrix MyResults has 2 extra entries.
  4 Comments
KSSV
KSSV on 22 May 2017
How you are sure that Nbrtot = 6 ?
Ano
Ano on 22 May 2017
what do you mean ?? for me Nbrtot is the total number of element that should be in the whole summation it is fixed but I have divided my problem into those loops in order to simplify it . any suggestions how to make the entries exactly as specified ?

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Accepted Answer

Stephen23
Stephen23 on 22 May 2017
Edited: Stephen23 on 22 May 2017
for l = 1:year % one iteration
for nbrrepetiton = 0:l % two iterations
for NoYes = [0 1] % two iterations
for semester = [1 2] % two iterations
Each nested loop multiplies the total iterations by its own number of iterations, so we get:
1x2x2x2 = 8
So we find that MATLAB is doing exactly what you told it to do: eight iterations in total. There is no reason to expect six iterations here.

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