def readSpec(cls, filename):
"""Read a sigpyproc format ``.spec`` file.
Parameters
----------
filename : str
the name of the ``.spec`` file to read
Returns
-------
:class:`~sigpyproc.FourierSeries.FourierSeries`
an array containing the whole file contents
Notes
-----
This is not setup to handle ``.spec`` files such as are
created by Sigprocs seek module. To do this would require
a new header parser for that file format.
"""
header = Header.parseSigprocHeader(filename)
hdrlen = header["hdrlen"]
f = File(filename, "r", nbits=32)
f.seek(hdrlen)
data = np.fromfile(f, dtype="complex32")
return cls(data, header)
def test_parseSigprocHeader(self, timfile):
header = Header.parseSigprocHeader(filename=timfile)
assert header.nbits == 32
assert header.source_name == "Mystery_PSR"
assert header.telescope_id == 6
assert header.machine_id == 4
assert header.ra == "16:43:38.1000"
assert header.dec == "-12:24:58.7000"
assert header.nsamples == 66250
assert header.nchans == 1
def __init__(self, filename):
self.filename = filename
self.header = Header.parseSigprocHeader(self.filename)
self._file = File(filename, "r", self.header.nbits)
self.itemsize = np.dtype(self.header.dtype).itemsize
if self.header.nbits in {1, 2, 4}:
self.bitfact = 8 // self.header.nbits
else:
self.bitfact = 1
self.sampsize = self.header.nchans * self.itemsize // self.bitfact
super().__init__()
def readTim(cls, filename):
"""Read a sigproc format ``.tim`` file.
Parameters
----------
filename : str
the name of the ``.tim`` file to read
Returns
-------
:class:`~sigpyproc.TimeSeries.TimeSeries`
a new TimeSeries object
"""
header = Header.parseSigprocHeader(filename)
nbits = header["nbits"]
hdrlen = header["hdrlen"]
f = File(filename, "r", nbits=nbits)
f.seek(hdrlen)
data = np.fromfile(f, dtype=header["dtype"]).astype(np.float32, copy=False)
return cls(data, header)
def test_getDMdelays(self, filfile):
header = Header.parseSigprocHeader(filename=filfile)
delays_time = header.getDMdelays(dm=100, in_samples=False)
delays_samp = header.getDMdelays(dm=100, in_samples=True)
np.testing.assert_equal(delays_samp.mean(), 193.3125)
np.testing.assert_allclose(delays_time.mean(), 0.013913)
def test_prepOutfile(self, filfile, tmpfile):
myheader = Header.parseSigprocHeader(filename=filfile)
outfile = myheader.prepOutfile(tmpfile)
out_header = Header.parseSigprocHeader(filename=outfile.name)
np.testing.assert_equal(out_header.SPPHeader(), myheader.SPPHeader())
