def cached_chisq_bins(self, template, psd):
from pycbc.opt import LimitedSizeDict
key = id(psd)
if not hasattr(psd, '_chisq_cached_key'):
psd._chisq_cached_key = {}
if not hasattr(template, '_bin_cache'):
template._bin_cache = LimitedSizeDict(size_limite=2**2)
if key not in template._bin_cache or id(
template.params) not in psd._chisq_cached_key:
psd._chisq_cached_key[id(template.params)] = True
num_bins = int(self.parse_option(template, self.num_bins))
if hasattr(
psd,
'sigmasq_vec') and template.approximant in psd.sigmasq_vec:
kmin = int(template.f_lower / psd.delta_f)
kmax = template.end_idx
bins = power_chisq_bins_from_sigmasq_series(
psd.sigmasq_vec[template.approximant], num_bins, kmin,
kmax)
else:
bins = power_chisq_bins(template, num_bins, psd,
template.f_lower)
template._bin_cache[key] = bins
return template._bin_cache[key]
def set_ref_time(self, inj, ts):
"""Sets t=0 of the given time series based on what the given
injection's ``ref_point`` is.
"""
try:
ref_point = inj.ref_point
except AttributeError as _err:
# Py3.XX: uncomment the "from _err" when we drop 2.7
raise ValueError("Must provide a ref_point for {} injections"
.format(self.injtype)) #from _err
# try to get from buffer
if self._rtbuffer is None:
self._rtbuffer = LimitedSizeDict(size_limit=self._buffersize)
try:
reftime = self._rtbuffer[inj.filename, ref_point]
except KeyError:
if ref_point == "start":
reftime = 0.
elif ref_point == "end":
reftime = -len(ts)*ts.delta_t
elif ref_point == "center":
reftime = -len(ts)*ts.delta_t/2.
elif ref_point == "absmax":
reftime = -ts.abs_arg_max()*ts.delta_t
elif isinstance(ref_point, (float, int)):
reftime = -float(ref_point)
else:
raise ValueError("Unrecognized ref_point {} provided"
.format(ref_point))
self._rtbuffer[inj.filename, ref_point] = reftime
ts._epoch = reftime
def loadts(self, inj):
"""Loads an injection time series.
After the first time a time series is loaded it will be added to an
internal buffer for faster in case another injection uses the same
series.
"""
if self._buffer is None:
# create the buffer
self._buffer = LimitedSizeDict(size_limit=self._buffersize)
try:
return self._buffer[inj.filename]
except KeyError:
pass
# not in buffer, so load
if inj.filename.endswith('.gwf'):
try:
channel = inj.channel
except AttributeError as _err:
# Py3.XX: uncomment the "from _err" when we drop 2.7
raise ValueError("Must provide a channel for "
"frame files") #from _err
ts = frame.read_frame(inj.filename, channel)
else:
ts = load_timeseries(inj.filename)
# cache
self._buffer[inj.filename] = ts
return ts
def resize(self, new_size):
"""Resize self to new_size
"""
if new_size == len(self):
return
else:
self._saved = LimitedSizeDict(size_limit=2**5)
new_arr = zeros(new_size, dtype=self.dtype)
if len(self) <= new_size:
new_arr[0:len(self)] = self
else:
new_arr[:] = self[0:new_size]
self._data = new_arr._data
def roll(self, shift):
"""shift vector
"""
self._saved = LimitedSizeDict(size_limit=2**5)
new_arr = zeros(len(self), dtype=self.dtype)
if shift == 0:
return
if shift < 0:
shift=len(self) + shift
new_arr[0:shift] = self[len(self)-shift: len(self)]
new_arr[shift:len(self)] = self[0:len(self)-shift]
self._data = new_arr._data
def __init__(self, initial_array, dtype=None, copy=True):
""" initial_array: An array-like object as specified by NumPy, this
also includes instances of an underlying data type as described in
section 3 or an instance of the PYCBC Array class itself. This
object is used to populate the data of the array.
dtype: A NumPy style dtype that describes the type of
encapsulated data (float32,compex64, etc)
copy: This defines whether the initial_array is copied to instantiate
the array or is simply referenced. If copy is false, new data is not
created, and so all arguments that would force a copy are ignored.
The default is to copy the given object.
"""
self._scheme = _scheme.mgr.state
self._saved = LimitedSizeDict(size_limit=2**5)
#Unwrap initial_array
if isinstance(initial_array, Array):
initial_array = initial_array._data
if not copy:
if not _scheme_matches_base_array(initial_array):
raise TypeError("Cannot avoid a copy of this array")
else:
self._data = initial_array
# Check that the dtype is supported.
if self._data.dtype not in _ALLOWED_DTYPES:
raise TypeError(str(self._data.dtype) + ' is not supported')
if dtype and dtype != self._data.dtype:
raise TypeError("Can only set dtype when allowed to copy data")
if copy:
# First we will check the dtype that we are given
if not hasattr(initial_array, 'dtype'):
initial_array = _numpy.array(initial_array)
# Determine the dtype to use
if dtype is not None:
dtype = _numpy.dtype(dtype)
if dtype not in _ALLOWED_DTYPES:
raise TypeError(str(dtype) + ' is not supported')
if dtype.kind != 'c' and initial_array.dtype.kind == 'c':
raise TypeError(
str(initial_array.dtype) + ' cannot be cast as ' +
str(dtype))
elif initial_array.dtype in _ALLOWED_DTYPES:
dtype = initial_array.dtype
else:
if initial_array.dtype.kind == 'c':
dtype = complex128
else:
dtype = float64
# Cast to the final dtype if needed
if initial_array.dtype != dtype:
initial_array = initial_array.astype(dtype)
#Create new instance with initial_array as initialization.
if issubclass(type(self._scheme), _scheme.CPUScheme):
if hasattr(initial_array, 'get'):
self._data = _numpy.array(initial_array.get())
else:
self._data = _numpy.array(initial_array,
dtype=dtype,
ndmin=1)
elif _scheme_matches_base_array(initial_array):
self._data = _copy_base_array(initial_array) # pylint:disable=assignment-from-no-return
else:
initial_array = _numpy.array(initial_array,
dtype=dtype,
ndmin=1)
self._data = _to_device(initial_array) # pylint:disable=assignment-from-no-return
