## problem with extra entries in a matrix!

### Ano (view profile)

on 22 May 2017
Latest activity Edited by Stephen Cobeldick

on 22 May 2017

### Stephen Cobeldick (view profile)

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.

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Ano

### Ano (view profile)

on 22 May 2017

it's kind of tracking the holidays of the employees during for example a year how many times they took a break 'nbrrepetiton', and that break was it for holidays or health problems 'NoYes' and at which semester of the year they took it first or second.

KSSV

### KSSV (view profile)

on 22 May 2017

How you are sure that Nbrtot = 6 ?

Ano

### Ano (view profile)

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 ?

### Stephen Cobeldick (view profile)

on 22 May 2017
Edited by Stephen Cobeldick

### Stephen Cobeldick (view profile)

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.