+++ /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 Fourier power spectrum
-c author T. Schreiber (1998) and earlier
-c modified by H. Kantz 2007
-c===========================================================================
- parameter(nx=1000000)
- dimension x(nx)
- character*72 file, fout
- data h/1./, dh/0./
- data iverb/1/
-
- call whatido("Power spectrum by FFT",iverb)
- nmaxx=ican("l",nx)
- nexcl=ican("x",0)
- jcol=ican("c",0)
- h=fcan("f",h)
- dh=fcan("w",dh)
- isout=igetout(fout,iverb)
-
- do 10 ifi=1,nstrings()
- call nthstring(ifi,file)
- nmax=nmaxx
- call readfile(nmax,x,nexcl,jcol,file,iverb)
- if(file.eq."-") file="stdin"
- if(isout.eq.1) call addsuff(fout,file,"_sp")
- nmaxp=nless(nmax)
- if(nmaxp.ne.nmax)
- . write(istderr(),*) "spectrum: using first ", nmaxp
- if(dh.eq.0.) dh=h/nmaxp
- ibin=nmaxp*dh/(2*h)
- if(ibin.gt.0) write(istderr(),*)
- . "spectrum: binning", 2*ibin+1," frequencies"
- call store_spec(nmaxp,x,0)
- call outfile(fout,iunit,iverb)
- write(iunit,*) 0., x(1)
- do 20 i=2+ibin,nmaxp/2+1-ibin,2*ibin+1
- p=0
- do 30 ib=i-ibin,i+ibin
- 30 p=p+x(2*ib-2)
- 20 write(iunit,*) h*(i-1)/real(nmaxp), p
- if(iunit.eq.istdout()) write(iunit,*)
- if(iunit.eq.istdout()) write(iunit,*)
- 10 if(iunit.ne.istdout()) close(iunit)
- end
-
- subroutine usage()
-c usage message
-
- call whatineed(
- . "[-f# -w# -o outfile -l# -x# -c# -V# -h] file(s)")
- call popt("f","sampling rate, e.g. in Hz [default 1.]")
- call popt("w","frequency resolution, e.g. in Hz, [default 1/N]")
- 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_sp")
- call pall()
- stop
- end