tomwalters@0: % method of class @signal
tomwalters@0: %
tomwalters@0: % returns the height and lows in locations and time of all local maxima in the signal
tomwalters@0: % in case of continuus maxima, the last value of the series is taken
tomwalters@0: % 
tomwalters@0: %   INPUT VALUES:
tomwalters@0: %  
tomwalters@0: %   RETURN VALUE:
tomwalters@0: %
bleeck@3: % This external file is included as part of the 'aim-mat' distribution package
bleeck@3: % (c) 2011, University of Southampton
bleeck@3: % Maintained by Stefan Bleeck (bleeck@gmail.com)
bleeck@3: % download of current version is on the soundsoftware site: 
bleeck@3: % http://code.soundsoftware.ac.uk/projects/aimmat
bleeck@3: % documentation and everything is on http://www.acousticscale.org
bleeck@3: 
tomwalters@0: 
tomwalters@0: function [maxpos,minpos,maxs,mins]=getminmax(sig)
tomwalters@0: % usage: [maxpos,minpos,maxs,mins]=getminmax(sig)
tomwalters@0: 
tomwalters@0: 
tomwalters@0: werte=getdata(sig);
tomwalters@0: werte=werte';
tomwalters@0: 
tomwalters@0: % find all maxima
tomwalters@0: % mit NULL!!
tomwalters@0: maxpos = find((werte >= [0 werte(1:end-1)]) & (werte > [werte(2:end) 0]));
tomwalters@0: maxs=werte(maxpos);
tomwalters@0: 
tomwalters@0: % find all minima
tomwalters@0: minpos = find((werte < [inf werte(1:end-1)]) & (werte <= [werte(2:end) inf]));
tomwalters@0: mins=werte(minpos);
tomwalters@0: 
tomwalters@0: maxpos=bin2time(sig,maxpos);
tomwalters@0: minpos=bin2time(sig,minpos);