How to reindex values from a vector

Question

Romeo Tahal 2020-3-22

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/512313-how-to-reindex-values-from-a-vector

评论： Romeo Tahal 2020-3-23

采纳的回答： Cris LaPierre

Hi everyone,

I have a question I would like to ask. I have the following issue:

index = [4 2 3 1 5]

The corresponding x vector is: [0.5392 0.7805 0.5867 0.4189 0.9886]

Now I want to change the index in sequence like: index = [1 2 3 4 5]

The corresponding x vector should be [0.4189 0.7805 0.5867 0.5392 0.9886]

I've tried to use this code: x(index) = [1 2 3 4 5] to come up with the corresponding values, but the program keeps on running. I have to stop it manually. What am I doing wrong here?

Regards,

Romeo

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Romeo Tahal 2020-3-23

Thank you, Cris

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Answer 1

Cris LaPierre 2020-3-22

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/512313-how-to-reindex-values-from-a-vector#answer_421387

在 MATLAB Online 中打开

index = [4 2 3 1 5];
x=[0.5392  0.7805  0.5867  0.4189  0.9886];
sortedX = x(index)
sortedX = 1×5    
    0.4189    0.7805    0.5867    0.5392    0.9886