peakdet

PEAKDET Detect peaks in a vector
        [MAXTAB, MINTAB] = PEAKDET(V, DELTA) finds the local
        maxima and minima ("peaks") in the vector V.
        MAXTAB and MINTAB consists of two columns. Column 1
        contains indices in V, and column 2 the found values.

        With [MAXTAB, MINTAB] = PEAKDET(V, DELTA, X) the indices
        in MAXTAB and MINTAB are replaced with the corresponding
        X-values.

        A point is considered a maximum peak if it has the maximal
        value, and was preceded (to the left) by a value lower by
        DELTA.