Mac binaries

[jabaws.git] / website / archive / binaries / mac / src / disembl / Tisean_3.0.1 / source_f / notch.f

diff --git a/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/notch.f b/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/notch.f
new file mode 100644 (file)
index 0000000..52265e0
--- /dev/null
+++ b/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/notch.f
@@ -0,0 +1,86 @@
+c===========================================================================
+c
+c   This file is part of TISEAN
+c 
+c   Copyright (c) 1998-2007 Rainer Hegger, Holger Kantz, Thomas Schreiber
+c 
+c   TISEAN is free software; you can redistribute it and/or modify
+c   it under the terms of the GNU General Public License as published by
+c   the Free Software Foundation; either version 2 of the License, or
+c   (at your option) any later version.
+c
+c   TISEAN is distributed in the hope that it will be useful,
+c   but WITHOUT ANY WARRANTY; without even the implied warranty of
+c   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+c   GNU General Public License for more details.
+c
+c   You should have received a copy of the GNU General Public License
+c   along with TISEAN; if not, write to the Free Software
+c   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+c
+c===========================================================================
+c   notch filter in the time domain
+c   author T. Schreiber
+c===========================================================================
+
+      parameter(nx=1000000)
+      dimension x(nx), y(nx)
+      character*72 file, fout
+      data h/1./, w/0.01/, pi/3.1415926/
+      data iverb/1/
+
+      call whatido("notch filter",iverb)
+      f=fmust("X")
+      h=fcan("f",h)
+      w=fcan("w",w)
+      fw=tan(pi*f/h)
+      nmaxx=ican("l",nx)
+      nexcl=ican("x",0)
+      jcol=ican("c",0)
+      isout=igetout(fout,iverb)
+
+      do 10 ifi=1,nstrings()
+         call nthstring(ifi,file)
+         nmax=nmaxx
+         call readfile(nmax,x,nexcl,jcol,file,iverb)
+         if(file.eq."-") file="stdin"
+         d=fnotch(nmax,x,y,fw,w)
+         if(isout.eq.1) call addsuff(fout,file,"_notch")
+ 10      call writefile(nmax,y,fout,iverb)
+      end
+
+      function fnotch(nmax,x,y,fw,w)
+      dimension x(nmax), y(nmax)
+
+      a=(1+w*fw)**2+fw**2
+      c0=   (1+fw**2)/a
+      c1=-2*(1-fw**2)/a
+      c2=c0
+      d1= 2*(1-w**2*fw**2-fw**2)/a
+      d2=  -((1-w*fw)**2+fw**2)/a
+
+      y(1)=c0*x(1)
+      y(2)=c0*x(2)+c1*x(1)+d1*y(1)
+      do 10 n=3,nmax
+ 10      y(n)=c0*x(n)+c1*x(n-1)+c2*x(n-2)+d1*y(n-1)+d2*y(n-2)
+      fnotch=0
+      do 20 n=1,nmax
+ 20      fnotch=fnotch+(x(n)-y(n))**2
+      fnotch=sqrt(fnotch/nmax)
+      end
+
+      subroutine usage()
+c usage message
+
+      call whatineed(
+     .   "-X# [-f# -w# -o outfile -l# -x# -c# -V# -h] file(s)")
+      call popt("X","frequency to be cancelled")
+      call popt("f","sampling rate of data (1)")
+      call popt("w","width of filter (f/100)")
+      call popt("l","number of values to be read (all)")
+      call popt("x","number of values to be skipped (0)")
+      call popt("c","column to be read (1 or file,#)")
+      call pout("file_notch")
+      call pall()
+      stop
+      end