Mac binaries

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

diff --git a/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/autocor.f b/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/autocor.f
new file mode 100644 (file)
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+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   autocor.f
+c   autocorrelation function through FFT
+c   author T. Schreiber (1998), H. Kantz (2007)
+c===========================================================================
+
+      parameter(nx=1000000)
+      dimension x(2*nx)
+      character*72 file, fout
+      data iverb/1/
+
+      call whatido("autocorrelation function estimated by FFT",iverb)
+      ivar=lopt('v',1)
+      iper=lopt('p',1)
+      iexact=lopt('P',1)
+      if(iexact.ne.0) iper=1
+      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"
+         if(ivar.eq.0) call normal(nmax,x,sc,sd)
+         if(iper.eq.0) then
+            nmaxp=nmore(2*nmax)
+            do 20 n=nmax+1,nmaxp
+ 20            x(n)=0.
+            call store_spec(nmaxp,x,1)
+            do 30 n=1,nmax
+ 30            x(n)=x(n)/real(nmax-n+1)
+         else
+            nmaxp=nmax
+            if(iexact.eq.0) then
+               nmaxp=nless(nmax)
+               if(nmaxp.ne.nmax.and.iv_io(iverb).eq.1)  
+     .            write(istderr(),*) "autocor: using", nmaxp
+            endif
+            call store_spec(nmaxp,x,1)
+            do 50 n=1,nmaxp
+ 50            x(n)=x(n)/real(nmaxp)
+         endif
+         if(isout.eq.1) call addsuff(fout,file,"_co")
+         call outfile(fout,iunit,iverb)
+         if(ivar.eq.0) then
+            if(sd.eq.0) stop "autocor: cannot normalise - zero variance"
+            fsc=1./x(1)
+         else
+            fsc=1.
+         endif
+         do 60 n=1,min(nmax,nmaxp)
+ 60         write(iunit,*) n-1, fsc*x(n)
+ 10      if(iunit.ne.istdout()) close(iunit)
+      end
+
+      subroutine usage()
+c usage message
+
+      call whatineed(
+     .   "[-v -p -P -o outfile -l# -x# -c# -V# -h] file(s)")
+      call popt("v","give unnormalised autocovariance")
+      call popt("p","assume periodic continuation")
+      call popt("P","assume periodic continuation exactly")
+      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_co")
+      call pall()
+      stop
+      end
+
+
+