Documentation of getweightedsum

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Function Synopsis

sumsig=getweightedsum(fr,cutoff,db_per_octave,von,bis)

Help text

 method of class @frame
 
   INPUT VALUES:
  
   RETURN VALUE:

 
 (c) 2003, University of Cambridge, Medical Research Council 
 Stefan Bleeck (stefan@bleeck.de)
 http://www.mrc-cbu.cam.ac.uk/cnbh/aimmanual
 $Date: 2003/01/17 16:57:46 $
 $Revision: 1.3 $

Cross-Reference Information

Listing of function getweightedsum

function sumsig=getweightedsum(fr,cutoff,db_per_octave,von,bis)
% weights the frequency with some function (usually lowpass)

if nargin<5
    bis=getnrchannels(fr);
end
if nargin < 4
    von=1;
end

if nargin < 2
    cutoff=4000;
end
if nargin < 3
    db_per_octave=6;  % quality above
end


% number=getnrchannels(fr);
cfs=getcf(fr);

samplesig=getsinglechannel(fr,1);
sumsig=signal(samplesig);
sumsig=mute(sumsig);
sumsig=setname(sumsig,sprintf('weighted sum of frame: %s',getname(fr)));

for i=von:bis
    sig=getsinglechannel(fr,i);
    cur_fre=cfs(i);
    scaler=getfiltervalue(cur_fre,cutoff,db_per_octave);    

    sig=sig*scaler;
    sumsig=sumsig+sig;

end