Min and local max of a curve

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chess on 10 Aug 2014
Edited: chess on 10 Aug 2014
Hi I have a histogram which I want to find its min and max. So lets say the first max happens around 0.1 the local mean is at around 0.3 and second local max is at around 0.8.
I use findpeaks command but my first question is how to find a location on horizontal axis after having the index of maxima or minima? (specially for the minima and second max)?
2-How to find location of minimum because findpeaks only gives maximum location?
  1 Comment
Azzi Abdelmalek
Azzi Abdelmalek on 10 Aug 2014
Can you attach the file of your data?

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Accepted Answer

Image Analyst
Image Analyst on 10 Aug 2014
Edited: Image Analyst on 10 Aug 2014
The usual method is to use findpeaks on the inverted signal, so that what were once valleys (minima) now become peaks.
flippedSignal = max(signal) - signal;
By the way, what does this have to do with image processing?
  1 Comment
chess on 10 Aug 2014
I got this curve from histogram of an image then I smooth it.

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