清空筛选条件
清空筛选条件

Indexing back into an array the same size as one that was just sorted

1 次查看（过去 30 天）
Bill
Bill 2016-5-27
评论： Bill 2016-5-27
I'm trying to first sort each row of a 3X3 array. And then take the subscripts of the two largest numbers in each row and pull them out.
So,
A = magic(3);
[~, IDX] = sort(A, 2, 'descend');
And then use IDX to pull out the largest 2 numbers in each row in array A, leaving me with and array sized 3,2.

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2016-5-27
FirstN = 2;
B = A(sub2ind(size(A), repmat((1:size(A,1)).',1,FirstN), IDX(:,1:FirstN)));

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Shifting and Sorting Matrices 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by