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Compare matrices from different programs

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fiona rozario
fiona rozario on 21 Feb 2017
Closed: MATLAB Answer Bot on 20 Aug 2021
I have two matrices created from two different programs. Matrix A from program A and matrix B from program B. The matrix sizes are same and I want to compare the elements of these matrices. Is that possible? If yes, how?

Answers (2)

Jan
Jan on 21 Feb 2017
If the matrices are small, you can subtract them:
A - B
abs(A- B)
If they are too large to keep the overview in the command window:
D = abs(A - B);
max(D(:))
min(D(:));
You can draw the difference:
Img = A - B;
Img = Img - min(Img(:));
Img = Img / max(Img(:)); % Normalize to [0, 1]
image(Img);
If you only want to check, if the matrices are equal:
isequal(A, B)
  2 Comments
Rik
Rik on 21 Feb 2017
Well, this is what you get from not being clear on how you precisely want to compare the matrices ;)
Jan
Jan on 22 Feb 2017
@Rik: And the detail that the matrices are comming from "two different programs" has not been considered. I hope that fiona gets inspirated by our suggestions.

Rik
Rik on 21 Feb 2017
A = [3 4;8 9];
B = [3 6;0 4];
AreElementsEqual = A==B ;

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