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How would I locate non-zeros given a condition?

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Aadi Duggal
Aadi Duggal on 28 Jan 2020
Closed: MATLAB Answer Bot on 20 Aug 2021
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?
Aadi Duggal
Aadi Duggal on 29 Jan 2020
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.

Answers (1)

Alex Mcaulley
Alex Mcaulley on 28 Jan 2020
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));

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