Find rows in matrix A that contain value x, find() fails

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Pseudoscientist
Pseudoscientist 2019-4-18
回答： Adam Danz 2019-4-18
I have a 472944 x 5 matrix and I need to locate rows have at least a single occurence of value x=0 in their four first (1:4) elements.
find(A==0); for some reason returns only some of the rows
I have attached the data

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Adam Danz
Adam Danz 2019-4-18
This will return a logical vector the same length as the number of rows in your matrix. 'True' values (1) mark rows that have at least one 0-value in the first four columns.
rowIdx = any(A(:,1:4) == 0, 2);
This will return the row numbers
rowNum = find(any(A(:,1:4) == 0, 2));

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