How to find the minimum set of columns in a matrix to ensure every row has at least one nonzero value
조회 수: 2 (최근 30일)
이전 댓글 표시
Hi. I'm hoping somebody knows of an elegant way to do this. I have an array of logical values MxN. I'm trying to find the minimum set of columns of that matrix such that every row has at least one true value.
A = rand(100,100)>0.5
The best I've got so far is to choose one column to start with, and then iteratively go through and find the column which has the highest impact on my end goal and include that. But I know that this doesn't ensure the best solution.
댓글 수: 0
답변 (1개)
Star Strider
2016년 5월 4일
If you’re looking column-wise to see what columns have one true value in every row (the way I interpret your question), then sum the matrix and look for column sums that equal ‘M’. All rows in that column would have to be true.
댓글 수: 2
참고 항목
카테고리
Help Center 및 File Exchange에서 Matrix Indexing에 대해 자세히 알아보기
제품
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!