How to unwrap a signal?

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Lizan
Lizan el 4 de Feb. de 2016
Editada: Walter Roberson el 4 de Feb. de 2016
I like to unwrap this vector, I calculated with a cos-function to obtain a nice dip.
The figure looks like this:
I would like to obtain this (see the orange line),
Attaching the vector as .mat
  1 comentario
Lizan
Lizan el 4 de Feb. de 2016
Editada: Lizan el 4 de Feb. de 2016
I had a code like this:
signal = p4;
t2 = 1:1:length(p4);
peakValue = max(signal);
index1 = find(signal > (peakValue - 0.001), 1, 'first');
index2 = find(signal > (peakValue - 0.001), 1, 'last');
signal(index1:index2) = 2 * peakValue - signal(index1:index2);
signal(index1:index2) = signal(index1:index2);
but it not working anymore..

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