MATLAB: How to assign vales to matrix

matrix value assigning

I need to put 1 or -1 and 2 or -2 in a square matrix by putting the condition using the for loop.But it is not working. Can any one help me please? Thanks in advance..
the code is
AA=rand([5]);
aa=rand([5]);
for i= 5
    for j= 5
        if (AA(i,j)>=0.5)
            BB(i,j)= 1;
            CC(i,j)= 2;
          else
              BB(i,j)= -1;
              CC(i,j)= -2;
          end
          if (aa(i,j)>=0.5)
              bb(i,j)= 1;
              cc(i,j)= 2;
          else
              bb(i,j)=  -1;
              cc(i,j)= -2;            
          end
      end
  end

Best Answer

You have define i and j in the for loop for the entire range. For example,
for i=1:5
  %%...
end
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