How to find specific changes in my curve?

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Faezeh Manesh 2019-10-2

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评论： Angelavtc 2020-11-3

Hello everyone,

Actually, I have a curve as bellow. I am trying to find theb red points in my curve where there are sort of bumps or shoulders in my curve. I don't know how I can find them. I know that there are not peaks. maybe I should look for a function to find change in slope.

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Adam Danz 2019-10-2

Some of those "peaks" may be very difficult to capture but I'd start with findpeaks().

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回答（2 个）

Ajay Kumar 2019-10-2

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在 MATLAB Online 中打开

doc ischange

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Faezeh Manesh 2019-10-2

Actually, ischange doesn't solve my problem

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Faezeh Manesh 2019-10-2

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Can anyone help me how I can calculate the slope of my curve at each point?

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Angelavtc 2020-11-3

hey, take a look on this answer:

https://www.mathworks.com/matlabcentral/answers/515523-second-derivative-from-a-smoothing-spline-fit?s_tid=srchtitle

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