how to make sum of same elements in binary matrix

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Lukas
Lukas 2014-3-22
评论： Lukas 2014-3-26
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
  2 个评论
Azzi Abdelmalek
Azzi Abdelmalek 2014-3-22
This is not clear, can you illustrate with a short example?
Jan
Jan 2014-3-22
You code fails due to the missing definition of SumE before the loops.

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Jan
Jan 2014-3-22
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(:));
  1 个评论
Lukas
Lukas 2014-3-26
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

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