THE AUDITORY MODELING TOOLBOX
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MAY2011_FINDLOCALPEAKS
finds peaks with optional quadratic interpolation
Input parameters:
| X | is the input signal |
| M | mode ('q' performs quadratic interpolation, 'v' finds valleys instead of peaks) |
| W | is the width tolerance; a peak will be eliminated if there is a higher peak within +-W samples |
Output parameters:
| K | are the peak locations in X (fractional if M='q') |
| V | are the peak amplitudes: if M='q' the amplitudes will be interpolated whereas if M~='q' then V=X(K). |
Description:
Outputs are column vectors regardless of whether X is row or column. If there is a plateau rather than a sharp peak, the routine will place the peak in the centre of the plateau. When the W input argument is specified, the routine will eliminate the lower of any pair of peaks whose separation is <=W; if the peaks have exactly the same height, the second one will be eliminated. All peak locations satisfy 1<K<length(X).
If no output arguments are specified, the results will be plotted.
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