how to find the row index of specific vector in a matrix
102 views (last 30 days)
Show older comments
Hi everyone, suppose there's a marix [2 0;-2 1;2 3], I want find the row index of [-2 1], i.e., [-2 1] is on the second row of [2 0;-2 1;2 3]. how to realize it in matlab? Many thanks!
0 Comments
Accepted Answer
Star Strider
on 7 Apr 2019
Try this:
A = [2 0;-2 1;2 3];
RowIdx = find(ismember(A, [-2 1],'rows'))
producing:
RowIdx =
2
2 Comments
Elizabeth Thompson
on 11 Mar 2022
How would I do this if the vector I am looking for is a subset of A? i.e. If A is a matrix with three columns, and I want to find which row a 1x2 array x is in of A? idx=find(ismember(A,x,'rows')) obviously wouldn't work here, but is there a way to do this still using the find(ismember()) command?
More Answers (0)
See Also
Categories
Find more on Characters and Strings in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!