gusucode.com > DSISoft是由加拿大地质调查局发布的用于垂直地震剖面(VSP)数据处理的免费软件包 > dsisoftv3/dsisoftv3/dsisoftv3/main/debias.m
function [dataout]=debias(datain,starttime,endtime) %[dataout]=debias(datain,starttime,endtime) % %This function will debias the data % datain is the input data % starttime is the time in seconds at which the analysis starts % endtime is the time in seconds at which the analysis ends % %The debias correction is applied to the whole data! % % Warning: The program does not check for unreasonable parameters % %Written by Marko Mah March 1999 %$Id: debias.m,v 3.0 2000/06/13 19:20:03 gilles Exp $ %$Log: debias.m,v $ %Revision 3.0 2000/06/13 19:20:03 gilles %Release 3 % %Revision 2.0 1999/05/21 18:45:27 mah %Release 2 % %Revision 1.1 1999/03/15 14:52:12 mah %Initial revision % % % %Copyright (C) 1998 Seismology and Electromagnetic Section/ %Continental Geosciences Division/Geological Survey of Canada % %This library is free software; you can redistribute it and/or %modify it under the terms of the GNU Library General Public %License as published by the Free Software Foundation; either %version 2 of the License, or (at your option) any later version. % %This library 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 %Library General Public License for more details. % %You should have received a copy of the GNU Library General Public %License along with this library; if not, write to the %Free Software Foundation, Inc., 59 Temple Place - Suite 330, %Boston, MA 02111-1307, USA. % %DSI Consortium %Continental Geosciences Division %Geological Survey of Canada %615 Booth St. %Ottawa, Ontario %K1A 0E9 % %email: dsi@cg.nrcan.gc.ca disp('[dataout]=debias(datain,starttime,endtime)') smpint=datain.fh{8}; %smpint is the sampling interval nrec=datain.fh{12}; %nrec is number of records is file dataout=datain; startpoint=round(starttime/smpint)+1; %startpoint is the starting time in samples endpoint=round(endtime/smpint)+1; %endpoint is the end time in samples for COUNT1=1:nrec [a,ntraces]=size(datain.dat{COUNT1}); %ntraces is the number of traces in the record correction=mean(datain.dat{COUNT1}(startpoint:endpoint,:)); %correction is the debias to be applied to each trace for COUNT2=1:ntraces dataout.dat{COUNT1}(:,COUNT2)=datain.dat{COUNT1}(:,COUNT2)-correction(1,COUNT2); % debiases trace by trace end %for COUNT2 end %for COUNT1