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Function: Compare each Element of 2 Matrix for zero and non-zero

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Hi There,
I want to create a logical function that returns true if all non-zero elements in Matrix Z^2 are accompanied by non-zero (true) elements at the same locations in Z.
For example;
Z = [1,0,1;1,1,1;1,0,1]
Z^2 = [2,0,2;3,1,3;2,0,2]
From this basic example, every non-zero element in Z^2 is accompanied by a non-zero in Z. Hence the function output would be TRUE.
for i=1:N
for j=1:M
function output = ABC(Z)
output = (Z(i,j) & Z^2(i,j) ~= 0) then TRUE
end
or something to that effect.
Thanks, Xen

Risposte (1)

Walter Roberson
Walter Roberson il 7 Dic 2019
Z2 = Z^2;
output = all(all(~Z2 | Z));
  3 Commenti
Walter Roberson
Walter Roberson il 7 Dic 2019
Modificato: Walter Roberson il 7 Dic 2019
You stated,
"I want to create a logical function that returns true if all non-zero elements in Matrix Z^2 are accompanied by non-zero (true) elements at the same locations in Z."
If you look at B, the first column is all non-zero and the other two columns are all 0. The non-zero entries in B are the first column. Each entry in the first column of A is also non 0. Whether there are non-zero entries in other columns of A is not relevant because no other column of B is non-zero and only the non-zero locations in B are important.
Xenofon Antoniou
Xenofon Antoniou il 7 Dic 2019
Hi Walter,
You are 100% correct. Thanks for the code and feedback.
Cheers, Xen

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