why the answer is coming as matrix and not a single number?

I'm trying to find an answer of an mathematics operation to find a difference in two different black and white images, and the answer is coming as an matrix and i only need a single value.... what can i do? and how i can take two values for different conditions (equal pr not equal) if the answer is coming as matrix with different number of ones at each time?

[José-Luis]

Well, without knowing how you calculate that difference, helping you is akin to try shooting pigeons with a blindfold on.

[haya yousuf]

i used many different ways of calculating the difference and i can't get specific values for the two conditions

[José-Luis]

An equally unspecific answer: there are very many different ways of getting a scalar when comparing two arrays. A straight on comparison, ==, will give a logical array.

[KSSV]

you may also consider trying isequal

[Thorsten]

What is the supposed meaning of the "single value" that you need?

[haya yousuf]

i mean for example (A==B)=0, the answer is not a matrix

[haya yousuf]

it worked with (isequal). Thank You:)

Answer 1

[dpb]

" and how i can take two values for different conditions (equal pr not equal) if the answer is coming as matrix ...?"

Well, the short answer is

truefalse=all(yourDifferenceArray);  % only a single pixel is noted as a difference
truefalse=any(yourDifferenceArray);  % takes every pixel to be different for TRUE

Or, of course, you could have some threshold of how many must be different to count by

truefalse=sum(yourDifferenceArray)<ThresholdNumber;

This assumes the difference is the plain subtraction so '==' returns 1 (TRUE) for locations that are the same.