how to make sum of same elements in binary matrix

hello. how to make sum of same elements in binary matrix by using "for"? code that a made makes only sum of true elements. i want to make sum of all elements...

if true
  function SumE = compare( BW1 , BW2 )
for a=1:110
  for b=1:110
      if (BW1(a,b)==BW2(a,b))
          SumE=SumE+1;
      end
  end
end
end
end

[Azzi Abdelmalek]

This is not clear, can you illustrate with a short example?

[Jan]

You code fails due to the missing definition of SumE before the loops.

Answer 1

[Jan]

Your function counts the number of elements, which have equal value in both matrices. There is no test, if the elements are TRUE or FALSE. Therefore I do not understand the relation between the question and the code.

A simplified version of your program:

function SumE = compare(BW1, BW2)
SumE = sum(BW1(:) == BW2(:));

[Lukas]

sorry if i described it worst. i thought something like this:

    function NumPixels = compare( BW1 , BW2 )
C=sum(sum(BW1(:)&BW2(:)));
D=sum(sum(~BW1(:)&~BW2(:)));
NumPixels=C+D;
end