--- /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 choose.f
+c Choose columns and sub-sequences from a file
+c author T. Schreiber (1999)
+c===========================================================================
+
+ parameter(nx=1000000,mx=5)
+ dimension x(nx,mx), icol(mx)
+ character*72 file, fout
+ data iverb/15/
+
+ call whatido("Choose columns and sub-sequences from a file",iverb)
+ nmax=ican("l",nx)
+ nexcl=ican("x",0)
+ mcmax=ican("m",0)
+ call columns(mc,mx,icol)
+ if(mcmax.eq.0) mcmax=max(1,mc)
+ isout=igetout(fout,iverb)
+
+ call nthstring(1,file)
+ call xreadfile(nmax,mcmax,nx,x,nexcl,icol,file,iverb)
+ if(file.eq."-") file="stdin"
+ if(isout.eq.1) call addsuff(fout,file,"_select")
+ call outfile(fout,iunit,iverb)
+ call xwritefile(nmax,mcmax,nx,x,fout,iverb)
+ end
+
+ subroutine usage()
+c usage message
+
+ call whatineed(
+ . "[-o outfile -l# -x# -m# -c#[,#] -V# -h] file")
+ call popt("l","number of values to be read (all)")
+ call popt("x","number of values to be skipped (0)")
+ call popt("m","number of columns to be read (1)")
+ call popt("c","columns to be read (1)")
+ call pout("file_select")
+ call pall()
+ stop
+ end