"Or" statement and "not equal to" signal

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.

M=[ 1 2 9
    2 3 6
    3 4 5
    4 4 3
    2 3 8];

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]

% 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]

Thank you!