Sorting a string according to the values of a vector of type double

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L'O.G. 2022-12-9

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https://ww2.mathworks.cn/matlabcentral/answers/1875017-sorting-a-string-according-to-the-values-of-a-vector-of-type-double

回答： Les Beckham 2022-12-9

采纳的回答： Les Beckham

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I have a vector A with numbers of type double. Two of the values of A are the same, e.g.,

A = [1.1 2.3 4.4 2.3 5.1];

I also have a corresponding string, e.g.,

vegetables = {'carrots' 'lettuce' 'cabbage' 'parsley' 'tomatoes'};

I want to order A in increasing values and re-arrange the string accordingly. If a value appears more than once, as is the case here, how do I make sure it's still counted? So here in this simple example I should end up with:

A = [1.1 2.3 2.3 4.4 5.1];
vegatables={'carrots' 'lettuce' 'parsley' 'cabbage' 'tomatoes'};

I tried to do this by

[~,idx] = ismember(sort(A),A);
vegatables_ordered = vegetables(idx);
A_ordered = sort(A);

But that doesn't get the string right. How do I do this? There won't be duplicate values in all cases, but I want to account for this possibility shown here.

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Answer 1

Les Beckham 2022-12-9

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https://ww2.mathworks.cn/matlabcentral/answers/1875017-sorting-a-string-according-to-the-values-of-a-vector-of-type-double#answer_1124392

在 MATLAB Online 中打开

It should be as simple as this unless I misunderstand what you are expecting.

A = [1.1 2.3 4.4 2.3 5.1];
vegetables = {'carrots' 'lettuce' 'parsley' 'cabbage' 'tomatoes'};
[As,idx] = sort(A)
As = 1×5
    1.1000    2.3000    2.3000    4.4000    5.1000
idx = 1×5
     1     2     4     3     5
vegetables(idx)
ans = 1×5 cell array
    {'carrots'}    {'lettuce'}    {'cabbage'}    {'parsley'}    {'tomatoes'}