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Sharah
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how to detect point before it went on plateau

Asked by Sharah
on 16 Jun 2014
Latest activity Answered by Star Strider
on 16 Jun 2014
Hello everyone, I am new to matlab and I am doing a force analysis. I would like to detect a point in matlab before it went on a plateau, for example, this picture below (taken from a journal)
but from my graph, i can only able to detect the peak point, not the plateau, example below
(top picture) i am not sure how to find the minimum point of plateau (green line graph) and the point until it start to go down again, and then plot a line through it, as well as label each point (tp, tr, tf). will somebody help me on this?
attached is my data for 3 forces and time.

  2 Comments

What is the algorithm described in the paper? Can't you just use the same method they did?
i don't think they use any specific algorithm, they just detect the point befre and after the plateau.

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1 Answer

Answer by Star Strider
on 16 Jun 2014
 Accepted Answer

It looks as though the ‘LC Green’ signal is what you want. You might have to filter it first to eliminate the noise, but then I would take its derivative and test for the derivative being close to zero. That should approximately define the start and end points of the plateau.

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