find X of corresponding local minima

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Sagar Dhage
Sagar Dhage 2014-7-8
评论： Sagar Dhage 2014-7-8
I have Fx values (ie Y) and corresponding T values (X). To findout the local minima, i have used following prog. [Maxima,MaxIdx] = findpeaks(Fx); FxInv = 1.01*max(Fx) - Fx; [c,MinIdx] = findpeaks(FxInv); Minima = Fx(MinIdx); a= Minima(Minima >100); % further find out values of peak of Fx more than 100.
How I can find T values(X), corresponding to a? i tried b=T(a) but it doesn't work

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Jos (10584)
Jos (10584) 2014-7-8
Finding minima of a signal X is the same as finding the maxima of the signal -X

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Azzi Abdelmalek
Azzi Abdelmalek 2014-7-8
You can use
[a,idx]=findpeaks(Fx,'MINPEAKHEIGHT',100)
b=T(idx)
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