Extract data from matrices and arrays using vectors of coordinates
조회 수: 70 (최근 30일)
이전 댓글 표시
I have a matrix and I want to use two vectors of row and column index coordinates in order to extract the elements from it. In particular, I can define a 3 x 3 matrix as
A = [1 2 3; 3 4 5; 8 9 10]
And I want to use two vectors to extract the elements (2,2), (3,1), (1,3). My intention is to do this using the vectors for each corrdinates. I have been trying to do it by writing
A([2 3 1], [2 1 3])
but of course this is not working. I believe that this is a basic sintax issue.
Thank you so much
댓글 수: 0
채택된 답변
the cyclist
2021년 9월 28일
편집: the cyclist
2021년 9월 28일
Using your example:
A = [1 2 3; 3 4 5; 8 9 10]
linearIndex = sub2ind(size(A),[2 3 1], [2 1 3])
A(linearIndex)
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Matrix Indexing에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!