How would I locate non-zeros given a condition?

Say that I have the matrix

1 0 1 1

0 0 0 1

0 0 0 0

and I want to find the row with a non-zero in the 4th column and at least 1 more non-zero in columns 1-3. Anyone know how I would approach this?

[Walter Roberson]

This looks like homework.

[Aadi Duggal]

Haha, the original question was about lottery numbers on an excel file that had the same value as the 6th number and values 1-5. I tried setting up a logic statement to get 1s and 0s but wasn’t sure how to use “find” with the condition. Our professor told us to “use google and your resources” before asking them, so I’m just taking that to heart.

Answer 1

[Alex Mcaulley]

For example:

A = [1  0  1  1 
0  0  0  1
0  0  0  0];
rows = find(A(:,4) & sum(A(:,1:3)~=0,2));

[Aadi Duggal]

Thanks a lot, really appreciate it