--- /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 delay coordinates for periodic orbits
+C Copyright (C) Thomas Schreiber (1998)
+c===========================================================================
+ parameter(nx=1000)
+ dimension x(nx)
+ character*72 file, fout
+ data m/2/
+ data iverb/1/
+
+ call whatido("embed using delay coordinates",iverb)
+ id=imust("d")
+ m=ican("m",m)
+ ipp=ican("p",0)
+ isout=igetout(fout,iverb)
+ call nthstring(1,file)
+ call infile(file,iunit,iverb)
+ if(isout.eq.1) call addsuff(fout,file,"_delay")
+ call outfile(fout,iunit2,iverb)
+
+ 1 read(iunit,*,err=1,end=999) ipor, dum1, dum2
+ do 10 ip=1,ipor
+ 10 read(iunit,*,end=999) idum, x(ip)
+ if(ipp.ne.0.and.ipor.ne.ipp) goto 1
+ do 20 ip=1,ipor+1
+ 20 write(iunit2,*) (x(mod(ip-(j-1)*id-1+m*ipor,ipor)+1), j=m,1,-1)
+ write(iunit2,'()')
+ write(iunit2,'()')
+ goto 1
+ 999 continue
+ end
+
+ subroutine usage()
+c usage message
+
+ call whatineed(
+ . "-d# [-m# -p# -o outfile -l# -x# -c# -V# -h] file")
+ call popt("d","delay")
+ call popt("m","embedding dimension (2)")
+ call popt("p","period of orbit (1)")
+ 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_delay")
+ call pall()
+ stop
+ end
+
+