def _make_time_bins(axis, freq, begin=None, end=None,
closed='right', label='right'):
assert(isinstance(axis, DatetimeIndex))
if len(axis) == 0:
# TODO: Should we be a bit more careful here?
return [], [], []
first, last = _get_range_edges(axis, begin, end, freq, closed=closed)
binner = DatetimeIndex(freq=freq, start=first, end=last)
# a little hack
trimmed = False
if len(binner) > 2 and binner[-2] == axis[-1]:
binner = binner[:-1]
trimmed = True
# general version, knowing nothing about relative frequencies
bins = lib.generate_bins_dt64(axis.asi8, binner.asi8, closed)
if label == 'right':
labels = binner[1:]
elif not trimmed:
labels = binner[:-1]
else:
labels = binner
return binner, bins, labels
def _get_time_bins(self, axis):
assert(isinstance(axis, DatetimeIndex))
if len(axis) == 0:
binner = labels = DatetimeIndex(data=[], freq=self.freq)
return binner, [], labels
first, last = _get_range_edges(axis, self.begin, self.end, self.freq,
closed=self.closed, base=self.base)
binner = DatetimeIndex(freq=self.freq, start=first, end=last)
# a little hack
trimmed = False
if len(binner) > 2 and binner[-2] == axis[-1]:
binner = binner[:-1]
trimmed = True
# general version, knowing nothing about relative frequencies
bins = lib.generate_bins_dt64(axis.asi8, binner.asi8, self.closed)
if self.label == 'right':
labels = binner[1:]
elif not trimmed:
labels = binner[:-1]
else:
labels = binner
return binner, bins, labels
def _group_timestamps(self):
if self.kind is None or self.kind == 'timestamp':
binner = self._generate_time_binner()
# a little hack
trimmed = False
if len(binner) > 2 and binner[-2] == self.axis[-1]:
binner = binner[:-1]
trimmed = True
# general version, knowing nothing about relative frequencies
bins = lib.generate_bins_dt64(self.axis.asi8, binner.asi8,
self.closed)
if self.label == 'right':
labels = binner[1:]
elif not trimmed:
labels = binner[:-1]
else:
labels = binner
return binner, bins, labels
elif self.kind == 'period':
index = PeriodIndex(start=self.axis[0], end=self.axis[-1],
freq=self.offset)
end_stamps = (index + 1).asfreq('D', 's').to_timestamp()
bins = self.axis.searchsorted(end_stamps, side='left')
return index, bins, index