matlab排序2列:第1列降序，第2列升序 [英] matlab sort 2 columns: column 1 descending and column 2 ascending

问题描述

我有一个3列的数组，像这样:

I have a 3 column array like this:

A = [6 -1 0;
     6  0 3;
     1  4 3;
     1  2 5];

我需要第一列按降序排列，第二列按升序排列，第三列按其他两列(即它们未排序)的方式更改，如下所示:

I need the first column to be in descending order and the second column to be in ascending order with the third column changing with the other two columns (i.e. they are not sorted) like this:

B = [6 -1 0;
     6  0 3;
     1  2 5;
     1  4 3];

推荐答案

如果要保留行作为记录的完整性，并根据第1列和第2列对它们进行排序，请使用sortrows()(带负数列)索引以指示其值将按降序排序的列.

If you're looking to keep the rows intact as records, and sort them based on column 1 and then column 2, use sortrows(), with negative column indexes to indicate columns whose values are to be sorted in descending order.

B = sortrows(A, [-1 2])

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