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powerspec takes as input a Gadget2 binary snapshot file and calculates
the power spectrum.

Usage:
./powerspectrum [-i I] [-l L] INPUT OUTPUT

Options:
-i --interpolation	Choose interpolation scheme.
			One of NGP, CIC, TSC [CIC]. 

-l --lengthscale	Choose length scale of the Gadget file
			One of kpc, Mpc [Mpc].

Options only look at the first character, so you may use e.g. -i N -l k

Install instructions are in INSTALL

powerspec  Calculates power spectrum from Gadget2 file
Copyright (C) 2008 Scott Wales

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.