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/unflat2.m
function [dataout]=unflat2(datain,datum_time,word) % %function [dataout]=unflat2(datain,datum_time,word) % %The funcion unflat2 unflattens the times stored in a header word from a desired datum time % %Input arguments are: % datain= input data in official DSI format % datum_time= datum time at which to unflatten the data from in seconds % word= header word containing the picked times of the horizon % %DSI customized VSP processing software %Written by Marko Mah February 1999 %$Id: unflat2.m,v 3.0 2000/06/13 19:22:36 gilles Exp $ %$Log: unflat2.m,v $ %Revision 3.0 2000/06/13 19:22:36 gilles %Release 3 % %Revision 2.0 1999/05/21 18:47:02 mah %Release 2 % %Revision 1.1 1999/02/09 21:47:55 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]=unflat2(datain,datum_time,word)'); dataout=datain; %initializes the data nrec=datain.fh{12}; %number of records int=datain.fh{8}; %sampling interval (sec) tstart=datain.fh{9}; %start time (sec) samples=datain.fh{7}; %number of points per trace for COUNT1=1:nrec [a,ntraces]=size(datain.dat{COUNT1}); %ntraces is the number of traces in the record dataout.dat{COUNT1}(:,1:ntraces)=0; %initialize traces for COUNT2=1:ntraces %calculates shift time from datum time and from trace header word 'word' shift=datain.th{COUNT1}(word,COUNT2)-datum_time; index=round(abs(shift)/int); %converts shift from time to samples if shift==0 %no shift dataout.dat{COUNT1}(:,COUNT2)=datain.dat{COUNT1}(:,COUNT2); elseif shift<0 %shift upwards dataout.dat{COUNT1}(1:(samples-index),COUNT2)=datain.dat{COUNT1}(index+1:samples,COUNT2); else %shift downwards dataout.dat{COUNT1}(index+1:samples,COUNT2)=datain.dat{COUNT1}(1:(samples-index),COUNT2); end %if index end %for COUNT2 end %for COUNT1