通过索引数组对单元格数组重新排序 [英] Reordering Cell Array by Array of Indices

问题描述

假设我有一个单元格数组x和一个整数数组y:

Suppose I have a cell array x and an integer array y:

x = {'apple', 'orange', 'banana', 'pear'};
y = [2 4 3 1];

实际上，y表示x的索引.我现在想创建一个单元格数组z，其中x的元素按这些索引的顺序指定重新排序.这会给我:

In fact, y represents indices of x. I want to now create a cell array z with the elements of x reordered as specified by the order of these indices. This would give me:

z = {'orange', 'pear', 'banana', 'apple'};

我可以在一行中执行此操作而不必遍历每个元素并将其依次放置在中吗?

Can I do this in one line without having to loop through each element and place it in z in turn?

推荐答案

z = x(y);

由于StackOverflow要求答案的长度至少为30个字符，因此此句子被创建为填充词.

这意味着:将按索引顺序将由索引y选择的元素为frrm x的单元格数组放入z. (这是MATLAB 下标的基础；其他索引方法是 linear 和 logical ，请参见

That means: put in z the cell array with elements frrm x, that are selected by the indices y, in the order of the indices. (that is the basics of MATLAB subscripting; other methods of indexing are linear and logical, see Mathworks site for details).

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