Choose randomly rows in a matrix
조회 수: 1 (최근 30일)
이전 댓글 표시
Hi I have a matrix with 2 columns, the first is for 'ID', the second is for 'age'. I want to randomly pick 'n'(e.g. 2) IDs of the matrix and return the IDs and the age of the same row.
Thanks
댓글 수: 0
답변 (1개)
Sean de Wolski
2013년 6월 12일
doc randperm
Then use the output of this as an index into your matrix.
x = magic(10);
idx = randperm(10,2)
x(idx,:)
댓글 수: 3
Walter Roberson
2013년 6월 13일
You are using an old version of MATLAB that does not support that syntax for randperm. Instead use
idx = randperm(size(x,1));
x(idx(1:2),:)
참고 항목
카테고리
Help Center 및 File Exchange에서 Creating and Concatenating Matrices에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!