--- /dev/null
+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 Wiener filter (2): filter using periodogram in file
+c author T. Schreiber (1998)
+c===========================================================================
+ parameter(nx=1000000)
+ dimension x(nx), a(nx)
+ character*72 file, fout, ffin
+ data h/1./, dh/0./
+ data iverb/1/
+
+ call whatido("Wiener filter (second part)",iverb)
+ h=fcan("f",h)
+ dh=fcan("w",dh)
+ nmax=ican("l",nx)
+ nexcl=ican("x",0)
+ jcol=ican("c",0)
+ isfin=igetfin(ffin,iverb)
+ isout=igetout(fout,iverb)
+ call nthstring(1,file)
+ if(file.eq."-") stop "wiener2: cannot read stdin"
+ call readfile(nmax,x,nexcl,jcol,file,iverb)
+ call normal(nmax,x,sc,sd)
+ nmaxp=nmore(nmax)
+
+ if(dh.eq.0.) dh=h/nmaxp
+ ibin=nmaxp*dh/(2*h)
+ if(ibin.gt.0) write(istderr(),*)
+ . "wiener1: binning", 2*ibin+1," frequencies"
+ if(isout.eq.1) call addsuff(fout,file,"_amp")
+ if(fout.eq." ") fout="-"
+ call infile(fout,iunit,iverb)
+ read(iunit,*) dum, a(1)
+ do 10 i=2+ibin,(nmaxp+1)/2-ibin,2*ibin+1
+ 10 read(iunit,*) dum, a(2*i-2)
+ if(mod(nmaxp,2).eq.0) read(iunit,*)
+ . dum, a(nmaxp)
+ d=tospec(nmaxp,a,x,ibin)
+ if(iv_io(iverb).eq.1) write(istderr(),*) "rms correction: ", d
+ if(isfin.eq.1) call addsuff(ffin,file,"_wc")
+ do 20 n=1,nmax
+ 20 x(n)=x(n)+sc
+ call writefile(nmax,x,ffin,iverb)
+ end
+
+ subroutine usage()
+c usage message
+
+ call whatineed(
+ . "[-f# -w# -o outfile1 -O outfile -l# -x# -c# -V# -h] file")
+ call ptext("to provide periodogram, first run:"//
+ . " wiener1 [-f# -w# -o outfile -l# -x# -c# -V# -h] file")
+ call ptext("make sure -f# -w# are the same in both wiener calls")
+ call popt("f","sampling rate (e.g. in Hz, default 1.)")
+ call popt("w","frequency resolution (e.g. in Hz, default 1/N)")
+ 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 popt("o","output file of wiener1, just -o means file_amp")
+ call popt("O","final output file name, just -O means file_wc")
+ call pall()
+ call ptext("Note: ""-"" not accepted as file")
+ write(istderr(),'()')
+ stop
+ end
+
+ function igetfin(fout,iverb)
+c gets alternate output file name, default " "
+c return 1 if fout must be determined from input file name
+ character*(*) fout
+
+ igetfin=0
+ call stcan("O",fout," ")
+ if(fout.ne." ") return
+ igetfin=lopt("O",1)
+ end