How can I extract rows using column values?
조회 수: 1 (최근 30일)
이전 댓글 표시
I'm trying to use the emnist byclass data set which includes digits and upper/lower case letters. I don't need all of the letters so I wanted to remove the unnecessary ones. The emnist set uses the first column as a label 0-61 and only need for example 0-9 and <49, 55, 11, 32, 13, 29, 30, 20, 33, 43, 24> these ones.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1007060/image.png)
댓글 수: 0
채택된 답변
Walter Roberson
2022년 5월 22일
classes_needed = [49, 55, 11, 32, 13, 29, 30, 20, 33, 43, 24];
mask = ismember(emnist(:,1), classes_needed);
subset = emnist(mask,:);
추가 답변 (1개)
MJFcoNaN
2022년 5월 22일
% random matrix
A=randi(50,10)
% needed lines index
ind=ismember(A(:,1), [0:9, 49, 55, 11, 32, 13, 29, 30, 20, 33, 43, 24]);
% needed rows
B=A(ind, :)
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Matrices and Arrays에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!