How to test montonousness of X Y data

Question

Pappu Murthy 2022-1-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1623605-how-to-test-montonousness-of-x-y-data

回答： Rik 2022-1-6

I have sets of XY data with anywhere from 1 to 10 elements in it. I need to check whether x vs y is montonously increasing or not. Even if one element is out of montony then I consider the data failed to test. What is the quickest way to check this. I need to perform this on 100s of sets of XY data with verying sizes. Thanks in advance.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Rik 2022-1-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1623605-how-to-test-montonousness-of-x-y-data#answer_869455

I would sort x, use the second output of sort to change the order of the y elements. That reduces the problem to the question whether there are any values smaller than the previous one. So using any(diff(data)<0) will give you the answer.