#!/usr/bin/env python
from __future__ import print_function
import sys
from presto import prepfold
if len(sys.argv) == 1:
sys.stderr.write("""usage: pfd_for_timing.py PFDFILES\n
This script returns 'true' or 'false' if a .pfd file can be
used for timing via get_TOAs.py or not.\n""")
sys.exit(0)
for pfdfile in sys.argv[1:]:
try:
pfd = prepfold.pfd(pfdfile)
if pfd.use_for_timing():
print("%s: true" % pfdfile)
else:
print("%s: false" % pfdfile)
except:
sys.stderr.write("Error: Can't check '%s'\n" % pfdfile)
for subs in a.split(','):
if (subs.find("-") > 0):
lo, hi = subs.split("-")
kill.extend(list(range(int(lo), int(hi)+1)))
else:
kill.append(int(subs))
if o in ("-i", "--kints"):
for ints in a.split(','):
if (ints.find("-") > 0):
lo, hi = ints.split("-")
kints.extend(list(range(int(lo), int(hi)+1)))
else:
kints.append(int(ints))
# Read the prepfold output file and the binary profiles
fold_pfd = pfd(sys.argv[-1])
# Check to make sure we can use this .pfd for timing purposes
if not fold_pfd.use_for_timing():
sys.stderr.write(
"Error: '%s' was made allowing prepfold to search!\n" % \
sys.argv[-1])
sys.exit(2)
# Read key information from the bestprof file
if fold_pfd.bestprof:
fold = fold_pfd.bestprof
else:
sys.stderr.write(
"Error: Can't open '%s.bestrof'! Regenerate with show_pfd.\n" % \
sys.argv[-1])
def calc_features_from_pfd(pfd_filepath):
pfd_data = prepfold.pfd(str(pfd_filepath))
if pfd_filepath.parent.name == 'positive':
label = 1
elif pfd_filepath.parent.name == 'negative':
label = 0
else:
label = -1
# return (label, 0, 0, 0, 0, 0, 0, 0, 0, 0,
# np.empty(shape=(0,)), np.empty(shape=(0,0)),
# np.empty(shape=(0,0)), np.empty(shape=(0,)))
pfd_data.dedisperse()
#### As done in: prepfold.pfd.plot_sumprofs
profile = pfd_data.sumprof
profile = normalise_1d(profile)
####
profiles_sum_axis0 = pfd_data.profs.sum(0)
#### As done in: prepfold.pfd.plot_chi2_vs_DM
loDM = 0
hiDM = pfd_data.numdms
N = pfd_data.numdms
profs = profiles_sum_axis0.copy() # = pfd_data.profs.sum(0)
DMs = psr_utils.span(loDM, hiDM, N)
chis = np.zeros(N, dtype='f')
subdelays_bins = pfd_data.subdelays_bins.copy()
for ii, DM in enumerate(DMs):
subdelays = psr_utils.delay_from_DM(DM, pfd_data.barysubfreqs)
hifreqdelay = subdelays[-1]
subdelays = subdelays - hifreqdelay
delaybins = subdelays * pfd_data.binspersec - subdelays_bins
new_subdelays_bins = np.floor(delaybins + 0.5)
for jj in range(pfd_data.nsub):
profs[jj] = psr_utils.rotate(profs[jj],
int(new_subdelays_bins[jj]))
subdelays_bins += new_subdelays_bins
sumprof = profs.sum(0)
chis[ii] = pfd_data.calc_redchi2(prof=sumprof, avg=pfd_data.avgprof)
####
# best_dm = pfd_data.bestdm
# crop_radius = 100
# best_dm_index = np.searchsorted(DMs, best_dm) # Not accurate, but close.
# bloated_chis = np.insert(chis, N, np.full(crop_radius, chis[-1]))
# bloated_chis = np.insert(bloated_chis, 0, np.full(crop_radius, chis[0]))
# cropped_chis = bloated_chis[ best_dm_index : best_dm_index+2*crop_radius ]
# chis = cropped_chis
#### As done in: prepfold.pfd.plot_intervals
intervals = pfd_data.profs.sum(1)
intervals = normalise_2d_rowwise(intervals)
####
#### As done in: prepfold.pfd.plot_subbands
subbands = profiles_sum_axis0.copy() # = pfd_data.profs.sum(0)
subbands = normalise_2d_rowwise(subbands)
####
return label, profile, intervals, subbands, chis
sumprof = Num.zeros(numbins, dtype='d')
base_T = None
base_BW = None
orig_fctr = None
Tprerfi = 0.0
Tpostrfi = 0.0
avg_S = 0.0
# Step through the profiles and determine the offsets
for pfdfilenm, killsubs, killints in zip(pfdfilenms, killsubss, killintss):
print("\n Processing '%s'..." % pfdfilenm)
# Read the fold data and de-disperse at the requested DM
current_pfd = pfd(pfdfilenm)
current_pfd.dedisperse(DM)
# This corrects for any searching that prepfold did to find the peak
current_pfd.adjust_period()
T = current_pfd.T
Tprerfi += T
BW = current_pfd.nsub * current_pfd.subdeltafreq
fctr = current_pfd.lofreq + 0.5 * BW
# If there are subbands to kill, kill em'
if killsubs is not None:
print(" killing subbands: ", killsubs)
current_pfd.kill_subbands(killsubs)
BW *= (current_pfd.nsub - len(killsubs)) / float(current_pfd.nsub)
# If there are intervals to kill, kill em'
if killints is not None:
def __init__(self,
pfdfile,
pointingfile,
profilefile=None,
offpulse=None,
autoroll=True):
"""
OTF_Scan(pfdfile, pointingfile, profilefile=None, offpulse=None, autoroll=True)
create an OTF_Scan object
needs a pfd file and a pointing file (a Table which has columns OFFS_SUB, RA_SUB, DEC_SUB)
if specified will also read in a file with the results of pygaussfit to determine the profile
offpulse will be pairs [min,max] where min and max are limits of phase window (phase is 0->1)
if autoroll, will roll the profile to center the pulse (makes some edge effects easier)
"""
self.pfd = pfd(pfdfile)
self.pfdfile = pfdfile
self.pointing = Table.read(pointingfile)
self.pointingfile = pointingfile
self.RA = Longitude(
np.interp(self.pfd.mid_secs, self.pointing["OFFS_SUB"],
self.pointing["RA_SUB"]) * u.deg)
self.Dec = Latitude(
np.interp(self.pfd.mid_secs, self.pointing["OFFS_SUB"],
self.pointing["DEC_SUB"]) * u.deg)
# is it a RA scan or Dec scan
if (self.RA.max() - self.RA.min()) * np.cos(self.Dec.mean()) > (
self.Dec.max() - self.Dec.mean()):
self.scantype = "RA"
self.offset = (self.RA - self.RA.mean()) * np.cos(self.Dec.mean())
else:
self.scantype = "Dec"
self.offset = self.Dec - self.Dec.mean()
self.freq = (self.pfd.hifreq + self.pfd.lofreq) / 2 * u.MHz
if self.pfd.telescope == "GBT":
self.diameter = 100 * u.m
else:
self.diameter = None
if profilefile is not None:
self.profile = PulseProfile(profilefile)
else:
self.profile = None
# Axis 0 = subints, axis 1 = channels, axis 2 = phase bins
self.pfd.dedisperse()
self.subints = np.arange(self.pfd.profs.shape[0])
self.channels = np.arange(self.pfd.profs.shape[1])
self.phasebins = np.arange(self.pfd.profs.shape[2])
self.phases = self.phasebins / (len(self.phasebins))
self.rollvalue = 0
# basic preparation
# define off-pulse window
self.set_offpulse(offpulse)
# determine the bandpass
self.get_bandpass()
# remove the bandpass
self.apply_bandpass()
# remove the variable sub-integration power
self.remove_subintpower()
# roll the pulse to center it (if desired)
if autoroll:
self.autoroll()
# fit a pulse profile if it is not already set
if self.profile is None:
self.profile = PulseProfile.fit_gaussian_profile(
self.phases, np.nanmean(self.squeezed_profs, axis=0))
