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import os
import tempfile
import scipy.io
import scipy.constants
import numpy as np
import logging
from .ifo import Struct, dictlist2recarray
from .plot import plot_noise
# NOTE: gwinc needs to be imported before matlab for some very strange
# reason:
#
# Traceback (most recent call last):
# File "./ifo2txt.py", line 9, in <module>
# import gwinc
# File "/home/jrollins/ligo/src/pygwinc/gwinc/__init__.py", line 9, in <module>
# from . import plot
# File "/home/jrollins/ligo/src/pygwinc/gwinc/plot.py", line 2, in <module>
# import matplotlib.pyplot as plt
# File "/usr/lib/python2.7/dist-packages/matplotlib/pyplot.py", line 29, in <module>
# import matplotlib.colorbar
# File "/usr/lib/python2.7/dist-packages/matplotlib/colorbar.py", line 32, in <module>
# import matplotlib.artist as martist
# File "/usr/lib/python2.7/dist-packages/matplotlib/artist.py", line 15, in <module>
# from .transforms import (Bbox, IdentityTransform, TransformedBbox,
# File "/usr/lib/python2.7/dist-packages/matplotlib/transforms.py", line 39, in <module>
# from matplotlib._path import (affine_transform, count_bboxes_overlapping_bbox,
# ImportError: /opt/matlab/R2016b/extern/engines/python/dist/matlab/engine/glnxa64/../../../../../../../sys/os/glnxa64/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by /usr/lib/python2.7/dist-packages/matplotlib/_path.x86_64-linux-gnu.so)
#
# no idea what that's about
import matlab.engine
def start_matlab():
"""Start a MATLAB engine"""
logging.info("starting matlab engine...")
eng = matlab.engine.start_matlab()
return eng
def ifo_add_constants(ifo):
"""Add "constants" sub-Struct to ifo Struct
This is required by MATLAB gwinc.
"""
#ifo.Constants.E0 = 8.8541878176e-12 # F / m; Permittivity of Free Space
ifo.Constants.E0 = scipy.constants.epsilon_0
#ifo.Constants.hbar = 1.054572e-34 # J - s; (Plancks constant) / (2 * pi)
ifo.Constants.hbar = scipy.constants.hbar
#ifo.Constants.kB = 1.380658e-23 # J / K; Boltzman Constant
ifo.Constants.kB = scipy.constants.k
#ifo.Constants.h = ifo.Constants.hbar * 2 * pi # J - s; Planks constant
#ifo.Constants.R = 8.31447215 # J / (K * mol); Gas Constant
#ifo.Constants.m_e = 9.10938291e-31 # kg; electron mass
#ifo.Constants.c = 2.99792458e8 # m / s; speed of light in vacuum
ifo.Constants.c = scipy.constants.c
ifo.Constants.yr = 365.2422 * 86400 # sec; Seconds in a year
#ifo.Constants.M_earth = 5.972e24 # mass of Earth [kg]
ifo.Constants.R_earth = 6.3781e6 # radius of Earth [m]
#ifo.Constants.fs = 16384 # Sampling frequency (Hz)
ifo.Constants.AU = 149597870700 # m; Astronomical unit, IAU 2012 Resolution B2
ifo.Constants.parsec = ifo.Constants.AU * (648000 / np.pi) # m, IAU 2015 Resolution B2
ifo.Constants.Mpc = ifo.Constants.parsec * 1e6 # m, IAU 2015 Resolution B2
ifo.Constants.SolarMassParameter = 1.3271244e20 # m^3 / s^2; G * MSol, IAU 2015 Resolution B3
#ifo.Constants.G = 6.67408e-11 # m^3 / (kg s^2); Grav. const
ifo.Constants.G = scipy.constants.G
# # http://arxiv.org/abs/1507.07956
ifo.Constants.MSol = ifo.Constants.SolarMassParameter / ifo.Constants.G # kg; Solar mass
#ifo.Constants.g = 9.806 # m / s^2; grav. acceleration
ifo.Constants.g = scipy.constants.g
# # http://physics.nist.gov/cuu/Constants/
#ifo.Constants.H0 = 67110; # ms^( - 1); Hubble const.
# # http://arxiv.org/pdf/1303.5076v3.pdf
#ifo.Constants.omegaM = 0.3175; # Mass density parameter
# # http://arxiv.org/pdf/1303.5076v3.pdf
#ifo.Constants.omegaLambda = 1 - ifo.Constants.omegaM; # Cosmological constant density parameter
# # omegaK = 0 (flat universe) is assumed
return ifo
NOISE_NAME_MAP = {
'Quantum': 'Quantum Vacuum',
'Newtonian': 'Newtonian Gravity',
'CoatBrown': 'Coating Brownian',
'CoatTO': 'Coating Thermo-Optic',
'SubBrown': 'Substrate Brownian',
'SubTE': 'Substrate Thermo-Elastic',
'SuspThermal': 'Suspension Thermal',
'ResGas': 'Excess Gas',
}
def _rename_noises(d):
nd = {}
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try:
nk = NOISE_NAME_MAP[k]
except KeyError:
nk = k
if isinstance(v, dict):
nd[nk] = _rename_noises(v)
else:
nd[nk] = v
return nd
def gwinc_matlab(f, ifo, fig=False, title=None, gwincpath=None, eng=None, **kwargs):
"""Execute gwinc in MATLAB with the specified ifo model.
This uses the python matlab.engine (see start_matlab()) to
calculate noises with MATLAB gwinc at the specified path
`gwincpath` (defaults to 'gwinc' in the current directory if not
specified, or uses the GWINCPATH environment variable).
returns [source, noises, ifo] as returned from matlab.
"""
if not gwincpath:
gwincpath = os.getenv('GWINCPATH', 'gwinc')
if not os.path.exists(os.path.join(gwincpath, 'gwinc.m')):
raise IOError("Invalid matlab gwinc path: '{}'".format(gwincpath))
if not eng:
eng = start_matlab()
logging.info("adding gwinc path: {}".format(gwincpath))
eng.addpath(gwincpath)
# add Constants attribute to ifo structure
ifo_add_constants(ifo)
# this stupidity because you can't just give the engine a np.ndarray
eng.workspace['f'] = f.tolist()
eng.eval('f = cell2mat(f);', nargout=0)
# similar stupidity prevents this (this time recarrays in the dict):
#eng.workspace['ifo'] = ifo.to_dict(array=True)
with tempfile.NamedTemporaryFile(suffix='.mat') as f:
scipy.io.savemat(f, ifo.to_dict(array=True))
eng.eval("ifo = load('{}');".format(f.name), nargout=0)
eng.eval('[score, noises, ifo] = gwinc(f, [], ifo, [], 0);', nargout=0)
with tempfile.NamedTemporaryFile(suffix='.mat') as f:
eng.save(f.name, 'score', 'noises', 'ifo', nargout=0)
data = scipy.io.loadmat(f, squeeze_me=True, struct_as_record=False)
score = data['score']
mnoises = Struct.from_matstruct(data['noises']).to_dict()
##### blow out 'MirrorThermal' sub-dict
for n,d in mnoises['MirrorThermal'].items():
if n == 'Total':
continue
mnoises[n] = d
del mnoises['MirrorThermal']
#####
noises = _rename_noises(mnoises)
return score, noises, ifo