Mac binaries

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

diff --git a/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/henon.f b/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/henon.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   henon.f
+c   iterate Henon map
+c   author Thomas Schreiber (1998)
+c===========================================================================
+      double precision xo, yo, xn, yn, a, b
+      character*72 fout
+      data a/1.4/,b/0.3/,ntrans/10000/,xo/.68587/,yo/.65876/
+      data iverb/1/
+
+      call whatido("Henon map",iverb)
+      nmax=imust('l')
+      ntrans=ican('x',ntrans)
+      a=fcan('A',real(a))
+      b=fcan('B',real(b))
+      xo=fcan('X',real(xo))
+      yo=fcan('Y',real(yo))
+      isout=igetout(fout,iverb)
+
+      if(isout.eq.1) fout="henon.dat"
+      call outfile(fout,iunit,iverb)
+      n=-ntrans
+ 1    n=n+1
+      xn=1.-a*xo**2+b*yo
+      yn=xo
+      xo=xn
+      yo=yn
+      if(n.lt.1) goto 1
+      write(iunit,*) real(xn), real(yn)
+      if(nmax.eq.0.or.n.lt.nmax) goto 1
+      end
+
+      subroutine usage()
+c usage message
+
+      call whatineed(
+     .   "-l# [-A# -B# -X# -Y# -o outfile -x# -V# -h]")
+      call popt("l","number of points x,y (l=0: infinite)")
+      call popt("A","parameter a (1.4)")
+      call popt("B","parameter b (0.3)")
+      call popt("X","initial x")
+      call popt("Y","initial y")
+      call popt("x","number of transients discarded (10000)")
+      call pout("henon.dat")
+      call pall()
+      stop
+      end
+
+