How to sort vector alternatively

Question

Vishal Sharma 2017-1-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/321356-how-to-sort-vector-alternatively

编辑： Stephen23 2017-1-21

I have a vector a=[1 3;3 4;3 6;4 8]; I want to alternatively sort matrix ‘a’ row wise (second column), i.e Highest element in second column should be row 1; second to highest element in second column shall be last row; third to highest element in second column shall be second row; and so on So, output shall be [4 8;3 4;1 3;3 6] Thanks

This command is working for sorting in order only b=sortrows(a,-2);

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Answer 1

Stephen23 2017-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/321356-how-to-sort-vector-alternatively#answer_251422

编辑：Stephen23 2017-1-21

在 MATLAB Online 中打开

>> a = [1,3; 3,4; 3,6; 4,8]
a =
     1     3
     3     4
     3     6
     4     8
>> tmp = sortrows(a,2);
>> [tmp(1:2:end,:);flipud(tmp(2:2:end,:))]
ans =
     1     3
     3     6
     4     8
     3     4

@Vishal Sharma: did you know that the less effort you put into solving your own homework problems then the less you will learn. Also note that copying someone else's works and presenting it as your own is called plagiarism, and in many countries is considered a serious criminal offense.