Variable Size Data Ouput error

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I'm simualting a project where one of the matlab functions states the following error:
"'y' is inferred as a variable-size matrix, but its size is specified as inherited or fixed. Verify 'y' is defined in terms of non-tunable parameters, or select the 'Variable Size' check box and specify the upper bounds in the Size box."
I have seen similar posts to this however couldn't find infomation on why my output is variable size,
The code for this aspect of the project is quite small and the following:
function y = sector(Valpha, Vbeta)
sector = [];
%all potential sectors for Vbeta greater than zero
if Vbeta>=0 & abs(Valpha) < abs(Vbeta/sqrt(3));
sector = 2;
end
if Vbeta>=0 & abs(Valpha) > abs(Vbeta/sqrt(3)) & Valpha >= 0;
sector = 1;
else sector = 3;
end
%all potential states for Vbeta less than or equal to zero
if Vbeta < 0 & abs(Valpha) < abs(Vbeta/sqrt(3));
sector = 5;
end
if Vbeta < 0 & abs(Valpha) > abs(Vbeta/sqrt(3)) & Valpha >= 0;
sector = 6;
else sector = 4;
end
y = sector;
Does anyone happen to know why the data is variable size and how I coulf stop it from being such.
Many thanks
  2 Comments
Abd Al-Rahman Al-Remal
Abd Al-Rahman Al-Remal on 24 Jun 2021
They should be vectors yes

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Accepted Answer

KSSV
KSSV on 24 Jun 2021
Note that the function name and the variable are on the same name. This is not allowed.
  7 Comments
Abd Al-Rahman Al-Remal
Abd Al-Rahman Al-Remal on 24 Jun 2021
Brilliant thank you so much for your help!

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