Incomplete docstring

[speleos]

obspy/obspy/signal/array_analysis.py

Lines 781 to 801 in dfb0213

	def array_transff_freqslowness(coords, slim, sstep, fmin, fmax, fstep,
	coordsys='lonlat'):
	"""
	Returns array transfer function as a function of slowness difference and
	frequency.
	:type coords: numpy.ndarray
	:param coords: coordinates of stations in longitude and latitude in degrees
	elevation in km, or x, y, z in km
	:type coordsys: str
	:param coordsys: valid values: 'lonlat' and 'xy', choose which coordinates
	to use
	:param slim: either a float to use symmetric limits for slowness
	differences or the tupel (sxmin, sxmax, symin, symax)
	:type fmin: float
	:param fmin: minimum frequency in signal
	:type fmax: float
	:param fmax: maximum frequency in signal
	:type fstep: float
	:param fstep: frequency sample distance
	"""

No description for sstep is provided

It is also acceptable to provide a Stream instead of a numpy.array with the coordinates.