Need to store some results of a function in a matrix

 for a=4:5
    [A]=correlacion(v7(a).imagen,v3(i).imagen)      
    end

And this is the function that I'm using

function [A]=correlacion(Ipat, Iref)
for i=1:20
   % Trobar la correlacio normalitzada entre el patro i la imatge de referencia:
     Icorr = normxcorr2(Ipat,Iref);
     [posY, posX] = find(abs(Icorr) == max(max(Icorr)));

     % Correccio de la posicio fent servir la mida del patro:
       posXreal= posX - (size(Ipat,2)-1)/2;
       posYreal= posY - (size(Ipat,1)-1)/2;
       A(i,:)=[posXreal' posYreal'];
  end 
  end

The idea is to store the results in a matrix A, but the program forget the numbers that has created.

Answer 1

[Matthew Eicholtz]

If I understand your problem correctly, the values stored in A when a=4 are being replaced by the new values generated by your function when a=5. There are many potential remedies to this problem. One solution might be to use separate variables for each value of a:

A4 = correlacion(v7(4).imagen,v3(i).imagen);
A5 = correlacion(v7(5).imagen,v3(i).imagen);

This works well when a=4:5, but maybe not if a had more values. Suppose a=1:100; then I would suggest trying a cell array:

A = cell(100,1);
for a=1:100
  A{a} = correlacion(v7(a).imagen,v3(i).imagen)      
end

[Daniel Alcaraz]

Thanks for your answer, I've just found the solution. Finally I did something like your method:

for i=1:20 [posXreal posYreal]=correlacion(i6(2).imagen,i3(i).imagen) A1(i,:)=posXreal end