conditional statements on matrices

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puccapearl
puccapearl 2024-4-8
评论： Voss 2024-4-8
Hi, I have two matrices like below:
I want to search when the 2nd column equals 0 on either matrix and make a new matrix that shows the 0 values along with its paired column 1 values. I also want to tag it to know from which matrix it came from.
Thank you! I am new to conditional statements.

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Voss
Voss 2024-4-8
Where M1 and M2 are your matrices:
idx1 = M1(:,2) == 0;
idx2 = M2(:,2) == 0;
tags = repelem([1; 2],[nnz(idx1) nnz(idx2)]);
result = [[M1(idx1,:); M2(idx2,:)] tags]
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puccapearl
puccapearl 2024-4-8
oh my gosh! *face palm*
Thank you! I'm sorry for the run around!

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