flat.m,v

具有特色的地震数据处理源码

head	3.0;
access;
symbols;
locks; strict;
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3.0
date	2000.06.13.19.20.16;	author gilles;	state Exp;
branches;
next	2.0;

2.0
date	99.05.21.18.45.35;	author mah;	state Exp;
branches;
next	1.1;

1.1
date	99.01.06.19.09.03;	author kay;	state Exp;
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next	;


desc
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3.0
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@Release 3
@
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@function [dataout]=flat(datain,flt_time,headw1)
%
%function [dataout]=flat(datain,flt_time,headw1)
%
%The funcion flat an the times stored in a header number to a desired time
%
%The flat function a seismic matrix with the flattened data
%Input arguments are:
%datain=	input data in official DSI format
%flt_time=	time at which to flat data in seconds
%headw1=	header word containing the picked times of the horizon
%
%DSI customized VSP processing software
%written by G. Perron

%$Id: flat.m,v 2.0 1999/05/21 18:45:35 mah Exp gilles $
%$Log: flat.m,v $
%Revision 2.0  1999/05/21 18:45:35  mah
%Release 2
%
%Revision 1.1  1999/01/06 19:09:03  kay
%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]=flat(datain,flt_time,headw1)');

n=datain.fh{7};				%number of points per trace
dataout=datain;

%time_num=find(datain.time==flt_time);
time_num=round(flt_time./datain.fh{8});
for COUNT=1:datain.fh{12}	%loop over records
	m=datain.th{COUNT}(12,1);	%number of traces in a record
	dataout.dat{COUNT}=zeros(n,m);

	trc_num=round(datain.th{COUNT}(headw1,:)/datain.fh{8})+1;

	diff_num=trc_num-time_num;

	for i=1:m

	  if diff_num(i) > 0
	    dataout.dat{COUNT}(1:n-diff_num(i)+1,i)=datain.dat{COUNT}(diff_num(i):n,i);

	  elseif diff_num(i) < 0
 dataout.dat{COUNT}(diff_num(i)*(-1):n,i)=datain.dat{COUNT}(1:n-(diff_num(i)*(-1)-1),i);

	  elseif diff_num(i) == 0
	    dataout.dat{COUNT}(:,i)=datain.dat{COUNT}(:,i);
	  end
	end
end %loop over records

@


2.0
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@Release 2
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@d16 1
a16 1
%$Id: flat.m,v 1.1 1999/01/06 19:09:03 kay Exp mah $
d18 3
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1.1
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@Initial revision
@
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@d16 4
a19 2
%$Id:$
%$Log:$
d21 1
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