How to find specific changes in my curve?

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.

[Adam Danz]

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

Answer 1

[Ajay Kumar]

doc ischange

[Faezeh Manesh]

Actually, ischange doesn't solve my problem

Answer 2

[Faezeh Manesh]

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

[Angelavtc]

hey, take a look on this answer:

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