Remove decreasing data in matrix

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Emily Heil 2021-11-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1590089-remove-decreasing-data-in-matrix

评论： Emily Heil 2021-11-18

I have a 2 column matrix with several thousand rows. In one column of the matrix, the data cyclicly increases and decreases. I want to remove all rows where the data is decreasing.

For example if my matrix looked like this:

rawdata = [1 2
2
2
2
2
2
2
2
2
2
2
2
2];

I'd want to remove rows 6-9.

Can anyone help?

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采纳的回答

Matt J 2021-11-18

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1590089-remove-decreasing-data-in-matrix#answer_834904

编辑：Matt J 2021-11-18

在 MATLAB Online 中打开

rawdata = [1 2
2
2
2
2
2
2
2
2
2
2
2
2];
rawdata(  [false; diff(rawdata(:,1))<0]   ,  : )=[]
rawdata = 9×2
   2
   2
   2
   2
   2
   2
   2
   2
   2