comparison toolboxes/MIRtoolbox1.3.2/MIRToolbox/readbdf.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function [DAT,S]=readbdf(DAT,Records,Mode)
+% [DAT,signal]=readedf(EDF_Struct,Records)
+% Loads selected Records of an EDF File (European Data Format for Biosignals) into MATLAB
+% <A HREF="http://www.medfac.leidenuniv.nl/neurology/knf/kemp/edf.htm">About EDF</A> 
+%
+% Records1	List of Records for Loading
+% Mode		0 	default
+%		1 	No AutoCalib
+%		Mode+2	Concatanated (channels with lower sampling rate if more than 1 record is loaded)
+
+%	Version 2.11
+%	03.02.1998
+%	Copyright (c) 1997,98 by Alois Schloegl
+%	[e-mail]	
+                      
+% This program is free software; you can redistribute it and/or
+% modify it under the terms of the GNU General Public License
+% as published by the Free Software Foundation; either version 2
+% of the  License, or (at your option) any later version.
+% 
+% This program is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+% GNU General Public License for more details.
+% 
+% You should have received a copy of the GNU General Public License
+% along with this program; if not, write to the Free Software
+% Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% This program has been modified from the original version for .EDF files
+% The modifications are to the number of bytes read on line 53 (from 2 to
+% 3) and to the type of data read - line 54 (from int16 to bit24). Finally the name
+% was changed from readedf to readbdf
+% T.S. Lorig Sept 6, 2002
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+if nargin<3 Mode=0; end;
+ 
+EDF=DAT.Head; 
+RecLen=max(EDF.SPR);
+
+S=NaN*zeros(RecLen,EDF.NS);
+DAT.Record=zeros(length(Records)*RecLen,EDF.NS);
+DAT.Valid=uint8(zeros(1,length(Records)*RecLen));
+DAT.Idx=Records(:)';
+        
+for nrec=1:length(Records),
+
+	NREC=(DAT.Idx(nrec)-1);
+	if NREC<0 fprintf(2,'Warning READEDF: invalid Record Number %i \n',NREC);end;
+
+	fseek(EDF.FILE.FID,(EDF.HeadLen+NREC*EDF.AS.spb*3),'bof');
+	[s, count]=fread(EDF.FILE.FID,EDF.AS.spb,'bit24');
+
+	S(EDF.AS.IDX2)=s;
+
+	%%%%% Test on  Over- (Under-) Flow
+%	V=sum([(S'==EDF.DigMax(:,ones(RecLen,1))) + (S'==EDF.DigMin(:,ones(RecLen,1)))])==0;
+	V=sum([(S(:,EDF.Chan_Select)'>=EDF.DigMax(EDF.Chan_Select,ones(RecLen,1))) + ...
+	       (S(:,EDF.Chan_Select)'<=EDF.DigMin(EDF.Chan_Select,ones(RecLen,1)))])==0;
+	EDF.ERROR.DigMinMax_Warning(find(sum([(S'>EDF.DigMax(:,ones(RecLen,1))) + (S'<EDF.DigMin(:,ones(RecLen,1)))]')>0))=1;
+	%	invalid=[invalid; find(V==0)+l*k];
+                             
+	if floor(Mode/2)==1
+		for k=1:EDF.NS,
+			DAT.Record(nrec*EDF.SPR(k)+(1-EDF.SPR(k):0),k)=S(1:EDF.SPR(k),k);
+		end;
+	else
+		DAT.Record(nrec*RecLen+(1-RecLen:0),:)=S;
+	end;
+
+	DAT.Valid(nrec*RecLen+(1-RecLen:0))=V;
+end;
+if rem(Mode,2)==0	% Autocalib
+	DAT.Record=[ones(RecLen*length(Records),1) DAT.Record]*EDF.Calib;
+end;                   
+
+DAT.Record=DAT.Record';
+return;         
+