--- /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 c2d.f
+c local slopes from c2
+c author T. Schreiber (1998)
+c===========================================================================
+
+ parameter(meps=1000)
+ dimension e(meps), c(meps)
+ character*72 file, fout, aline
+ data iav/1/
+ data iverb/1/
+
+ call whatido("local slopes from c1/c2 correlation sum data",iverb)
+ iav=ican('a',iav)
+ isout=igetout(fout,iverb)
+ if(nstrings().eq.0) call usage()
+ call nthstring(1,file)
+ call infile(file,iunit,iverb)
+ if(isout.eq.1) call addsuff(fout,file,"_d")
+ call outfile(fout,iunit2,iverb)
+ 1 read(iunit,'(a)',end=999) aline
+ 4 if(aline(1:1).ne."#") goto 1
+ if(aline(1:1).eq."#")
+ . read(aline(index(aline,"m=")+2:72),'(i20)',err=1) m
+ me=0
+ 2 read(iunit,'(a)') aline
+ if(aline(1:72).eq." ") goto 3
+ read(aline,*,err=999,end=999) ee, cc
+ if(cc.le.0.) goto 3
+ me=me+1
+ e(me)=log(ee)
+ c(me)=log(cc)
+ goto 2
+ 3 write(iunit2,'(4h#m= ,i5)') m
+ do 30 j=iav+1,me-iav
+ call slope(e(j-iav),c(j-iav),2*iav+1,s)
+ 30 if(s.gt.0.) write(iunit2,*) exp(0.5*(e(j+iav)+e(j-iav))), s
+ write(iunit2,'()')
+ write(iunit2,'()')
+ goto 4
+ 999 stop
+ end
+
+ subroutine slope(x,y,n,a)
+ dimension x(n),y(n)
+
+ sx=0.
+ sa=0
+ a=0.
+ do 10 i=1,n
+ 10 sx=sx+x(i)
+ do 20 i=1,n
+ sa=sa+(x(i)-sx/n)**2
+ 20 a=a+y(i)*(x(i)-sx/n)
+ a=a/sa
+ end
+
+
+ subroutine usage()
+c usage message
+
+ call whatineed(
+ . "[-a# -o outfile -V# -h] file")
+ call popt("a","average using -#,...,+# [1]")
+ call pout("file_d")
+ call pall()
+ stop
+ end
+
+