Filter signal with small noise in the base line

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franco otaola
franco otaola on 27 Jul 2020
hello,
I am looking to detect the different peaks in my signals and as I have to integrate them at the same time i need a smoth signal to detect the begining and end of my different peaks,
I thought about doing first a
findpeak
and then find the begining and the end of the peak by creating a window between each peak possition and then looking at a % of the maximum slope (and a %of the maximun negative) in that peak to find where it begings (and where it ends). my issue is that the signal is a little bit noisy (it is a measurement of GC). A signal threatment it is not my field I am looking some help here. i tryied sgolayfilt and also medfilt1 with no succes...
an immage of the what i see when i use findpeak :
note: I am doing this for positions bigger than 3624 to ignore the first part. so for y(3624:end)
i am uploading the signal fil so it is easier to understand my problem.
thanks

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R2017b

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