mirror of
https://github.com/Richard-Sti/csiborgtools.git
synced 2024-12-23 03:48:02 +00:00
170 lines
7.1 KiB
Python
170 lines
7.1 KiB
Python
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# Copyright (C) 2022 Richard Stiskalek
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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"""
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MPI script to calculate density field-derived fields in the CSiBORG
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simulations' final snapshot.
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"""
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from argparse import ArgumentParser
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from datetime import datetime
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from distutils.util import strtobool
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import numpy
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from mpi4py import MPI
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try:
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import csiborgtools
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except ModuleNotFoundError:
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import sys
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sys.path.append("../")
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import csiborgtools
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from taskmaster import work_delegation
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from utils import get_nsims
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###############################################################################
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# Density field #
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###############################################################################
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def density_field(nsim, parser_args):
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paths = csiborgtools.read.Paths(**csiborgtools.paths_glamdring)
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nsnap = max(paths.get_snapshots(nsim))
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box = csiborgtools.read.CSiBORGBox(nsnap, nsim, paths)
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parts = csiborgtools.read.read_h5(paths.particles(nsim))["particles"]
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gen = csiborgtools.field.DensityField(box, parser_args.MAS)
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field = gen(parts, parser_args.grid, in_rsp=parser_args.in_rsp,
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verbose=parser_args.verbose)
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fout = paths.field("density", parser_args.MAS, parser_args.grid,
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nsim, parser_args.in_rsp)
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print(f"{datetime.now()}: saving output to `{fout}`.")
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numpy.save(fout, field)
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###############################################################################
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# Velocity field #
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###############################################################################
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def velocity_field(nsim, parser_args):
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if parser_args.in_rsp:
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raise NotImplementedError("Velocity field in RSP is not implemented.")
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paths = csiborgtools.read.Paths(**csiborgtools.paths_glamdring)
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mpart = 1.1641532e-10 # Particle mass in CSiBORG simulations.
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nsnap = max(paths.get_snapshots(nsim))
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box = csiborgtools.read.CSiBORGBox(nsnap, nsim, paths)
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parts = csiborgtools.read.read_h5(paths.particles(nsim))["particles"]
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gen = csiborgtools.field.VelocityField(box, parser_args.MAS)
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field = gen(parts, parser_args.grid, mpart, verbose=parser_args.verbose)
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fout = paths.field("velocity", parser_args.MAS, parser_args.grid,
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nsim, in_rsp=False)
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print(f"{datetime.now()}: saving output to `{fout}`.")
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numpy.save(fout, field)
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###############################################################################
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# Potential field #
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###############################################################################
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def potential_field(nsim, parser_args):
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paths = csiborgtools.read.Paths(**csiborgtools.paths_glamdring)
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nsnap = max(paths.get_snapshots(nsim))
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box = csiborgtools.read.CSiBORGBox(nsnap, nsim, paths)
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# Load the real space overdensity field
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density_gen = csiborgtools.field.DensityField(box, parser_args.MAS)
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rho = numpy.load(paths.field("density", parser_args.MAS, parser_args.grid,
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nsim, in_rsp=False))
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rho = density_gen.overdensity_field(rho)
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# Calculate the real space potentiel field
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gen = csiborgtools.field.PotentialField(box, parser_args.MAS)
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field = gen(rho)
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if parser_args.in_rsp:
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parts = csiborgtools.read.read_h5(paths.particles(nsim))["particles"]
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field = csiborgtools.field.field2rsp(field, parts=parts, box=box,
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verbose=parser_args.verbose)
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fout = paths.field(parser_args.kind, parser_args.MAS, parser_args.grid,
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nsim, parser_args.in_rsp)
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print(f"{datetime.now()}: saving output to `{fout}`.")
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numpy.save(fout, field)
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###############################################################################
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# Radial velocity field #
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###############################################################################
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def radvel_field(nsim, parser_args):
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if parser_args.in_rsp:
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raise NotImplementedError("Radial vel. field in RSP not implemented.")
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paths = csiborgtools.read.Paths(**csiborgtools.paths_glamdring)
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nsnap = max(paths.get_snapshots(nsim))
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box = csiborgtools.read.CSiBORGBox(nsnap, nsim, paths)
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vel = numpy.load(paths.field("velocity", parser_args.MAS, parser_args.grid,
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nsim, parser_args.in_rsp))
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gen = csiborgtools.field.VelocityField(box, parser_args.MAS)
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field = gen.radial_velocity(vel)
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fout = paths.field("radvel", parser_args.MAS, parser_args.grid,
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nsim, parser_args.in_rsp)
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print(f"{datetime.now()}: saving output to `{fout}`.")
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numpy.save(fout, field)
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###############################################################################
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# Command line interface #
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###############################################################################
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if __name__ == "__main__":
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parser = ArgumentParser()
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parser.add_argument("--nsims", type=int, nargs="+", default=None,
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help="IC realisations. `-1` for all simulations.")
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parser.add_argument("--kind", type=str,
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choices=["density", "velocity", "radvel", "potential"],
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help="What derived field to calculate?")
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parser.add_argument("--MAS", type=str,
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choices=["NGP", "CIC", "TSC", "PCS"])
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parser.add_argument("--grid", type=int, help="Grid resolution.")
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parser.add_argument("--in_rsp", type=lambda x: bool(strtobool(x)),
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help="Calculate in RSP?")
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parser.add_argument("--verbose", type=lambda x: bool(strtobool(x)),
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help="Verbosity flag for reading in particles.")
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parser_args = parser.parse_args()
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comm = MPI.COMM_WORLD
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paths = csiborgtools.read.Paths(**csiborgtools.paths_glamdring)
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nsims = get_nsims(parser_args, paths)
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def main(nsim):
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if parser_args.kind == "density":
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density_field(nsim, parser_args)
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elif parser_args.kind == "velocity":
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velocity_field(nsim, parser_args)
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elif parser_args.kind == "radvel":
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radvel_field(nsim, parser_args)
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elif parser_args.kind == "potential":
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potential_field(nsim, parser_args)
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else:
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raise RuntimeError(f"Field {parser_args.kind} is not implemented.")
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work_delegation(main, nsims, comm, master_verbose=True)
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