Documentation of getsum

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Function Synopsis

sumsig=getsum(fr,fromchannel,tochannel)

Help text

 method of class @frame

   Accummulates the signal between "fromchannel" and "tochannel"
 
   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: 2003/01/31 19:51:07 $
 $Revision: 1.5 $

Cross-Reference Information

Listing of function getsum

function sumsig=getsum(fr,fromchannel,tochannel)


if nargin<3
    tochannel=getnrchannels(fr(1));
end
if nargin < 2
    fromchannel=1;
end


number=max(size(fr));
if number==1
    val=fr.values;
    l=getlength(fr);
    sr=getsr(fr);
	if getnrchannels(fr)>1
		summe=sum(val(fromchannel:tochannel,:));
	    sumsig=signal(summe);
	 	sumsig=setsr(sumsig,sr);
	    sumsig=setname(sumsig,sprintf('Sum of Frame: %s',getname(fr)));
 		sumsig=setstarttime(sumsig,getminimumtime(fr));
	else 
		sumsig=getsinglechannel(fr,1);
	end    
else
    for e=1:number
        
        val=fr(e).values;
        
        l=getlength(fr(e));
        sr=getsr(fr(e));
        
        summe(e)=sum(val(fromchannel:tochannel,:));
        
        sumsig(e)=signal(summe);
        sumsig(e)=setsr(sumsig(e),sr);
        
        sumsig(e)=setstarttime(sumsig(e),getminimumtime(fr(e)))
        
    end
end