"Or" statement and "not equal to" signal

Question

Miguel Cardoso 2020-4-14

编辑： Miguel Cardoso 2020-4-14

Good night!

I have a matrix (I will give as an example M) with three columns and N rows, where M(:,1) and M(:,2) varies between 1 and 4.

I want to rewritte M removing the rows where M(:,1) or M(:,2) are different from 4. I tried :

if(M(:,1)~=4)|(M(:,2)~=4)
    m=M;
end

I would like that my final matrix would be:

m=[1 2 9
   2 3 6
   2 3 8];

Unfortunatelly, my code is not given the desired result.

Hope you can help me!

Answer 1

Delprat Sebastien 2020-4-14

% find rows that does not contains 4 in col 1 & 2
rowOk=(M(:,1)~=4) & (M(:,2)~=4)
% Use logical indexing to keep these row
m=M(rowOk,:)

Miguel Cardoso 2020-4-14

Thank you!