+++ /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 part of the TISEAN randomize package for constraint surrogates
-c permutation scheme that swaps to randomly chosen data points
-c this may also be used as a template for your own attempts
-c author T. Schreiber (1999)
-c
-c-------------------------------------------------------------------
-c get permutation specific options
-c
- subroutine opts_permute()
- parameter(nx=100000)
- dimension nxclu(nx)
- character*80 filex
- common /permutecom/ mxclu, nxclu
-
- call stcan('X',filex,' ')
- mxclu=0
- if(filex.eq." ") return
- open(10,file=filex,status="old",err=999)
- 1 read(10,*,err=999,end=998) nn
- mxclu=mxclu+1
- nxclu(mxclu)=nn
- goto 1
- 998 return
- 999 write(istderr(),'(a)') "permute: cannot open "//filex
- stop
- end
-
-c-------------------------------------------------------------------
-c print version information on permutation scheme
-c
- subroutine what_permute()
- call ptext("Permutation scheme: random pairs")
- end
-
-c-------------------------------------------------------------------
-c print permutation specific usage message
-c
- subroutine usage_permute()
- call ptext("Permutation options: [-X xfile]")
- call popt("X", "list of indices excluded from permutation")
- end
-
-c-------------------------------------------------------------------
-c initialise all that is needed for permutation scheme
-c
- subroutine permute_init()
- parameter(nx=100000)
- dimension x(nx)
- common nmax,cost,temp,cmin,rate,x
-
- if(nmax.gt.nx) stop "permute: make nx larger."
- do 10 i=1,nmax
- call permute(n1,n2)
- 10 call exch(n1,n2)
- end
-
-c-------------------------------------------------------------------
-c find two indices n1, n2 to be exchanged, maybe using a parameter
-c par provided by the cooling schedule
-c
- subroutine permute(n1,n2)
- parameter(nx=100000)
- dimension nxclu(nx)
- common /permutecom/ mxclu, nxclu
- common nmax
- external rand
-
- 1 n1=min(int(rand(0.0)*nmax)+1,nmax)
- do 10 n=1,mxclu
- 10 if(n1.eq.nxclu(n)) goto 1
- 2 n2=min(int(rand(0.0)*nmax)+1,nmax)
- if(n2.eq.n1) goto 2
- do 20 n=1,mxclu
- 20 if(n2.eq.nxclu(n)) goto 2
- end
-
-c-------------------------------------------------------------------
-c given two indices n1, n2, actually perform the exchange
-c
- subroutine exch(n1,n2)
- parameter(nx=100000)
- dimension x(nx)
- common nmax,cost,temp,cmin,rate,x
-
- h=x(n1)
- x(n1)=x(n2)
- x(n2)=h
- end