tomwalters@0: % method of class @signal
tomwalters@0: % function sig=buildspikesfrompoints(sig,xx,yy)
tomwalters@0: % calculates a @signal from the points in x and y
tomwalters@0: % the new signal is zero everywhere except from the points in xx
tomwalters@0: %
tomwalters@0: %   INPUT VALUES:
tomwalters@0: %       sig:  original @signal
tomwalters@0: %       xx: x-values of points
tomwalters@0: %       yy: y-values of points
tomwalters@0: %    
tomwalters@0: %   RETURN VALUE:
tomwalters@0: %       sig: new @signal 
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
tomwalters@0: 
tomwalters@0: function sig=buildspikesfrompoints(sig,xx,yy)
tomwalters@0: % uage: sig=buildspikesfrompoints(sig,xx,yy)
tomwalters@0: % makes a dot of the hight given in yy at each point given in xx
tomwalters@0: % all other values =0
tomwalters@0: 
tomwalters@0: 
tomwalters@0: sig=mute(sig);
tomwalters@0: 
tomwalters@0: nr_points=length(xx);
tomwalters@0: for i=1:nr_points
tomwalters@0:     oldval=gettimevalue(sig,xx(i));
tomwalters@0:     newval=oldval+yy(i);
tomwalters@0:     sig=addtimevalue(sig,xx(i),newval);
tomwalters@0: end
tomwalters@0: 
tomwalters@0: