def test_concat_along_first_axis(self):
td1 = TimeDimension(Seconds(1), Seconds(2))
ts1 = ArrayWithUnits(np.ones((10, 3)), [td1, IdentityDimension()])
td2 = TimeDimension(Seconds(1), Seconds(2))
ts2 = ArrayWithUnits(np.ones((13, 3)), [td2, IdentityDimension()])
result = ArrayWithUnits.concat([ts1, ts2])
self.assertEqual((23, 3), result.shape)
def test_concat_with_differing_durations(self):
td1 = TimeDimension(Seconds(1), Seconds(2))
ts1 = ArrayWithUnits(np.ones((10, 3)), [td1, IdentityDimension()])
td2 = TimeDimension(Seconds(1), Seconds(3))
ts2 = ArrayWithUnits(np.ones((13, 3)), [td2, IdentityDimension()])
self.assertRaises(ValueError,
lambda: ArrayWithUnits.concat([ts1, ts2]))
def test_concat_along_second_axis(self):
td1 = TimeDimension(Seconds(1), Seconds(2))
ts1 = ArrayWithUnits(np.ones((10, 3)), [td1, IdentityDimension()])
td2 = TimeDimension(Seconds(1), Seconds(2))
ts2 = ArrayWithUnits(np.ones((10, 5)), [td2, IdentityDimension()])
result = ArrayWithUnits.concat([ts1, ts2], axis=1)
self.assertEqual((10, 8), result.shape)
self.assertIsInstance(result.dimensions[0], TimeDimension)
self.assertIsInstance(result.dimensions[1], IdentityDimension)
def test_concat_with_differing_freqs(self):
ts = ArrayWithUnits(np.ones(
(10,
3)), [TimeDimension(Seconds(2), Seconds(2)),
IdentityDimension()])
ts2 = ArrayWithUnits(np.ones(
(13,
3)), [TimeDimension(Seconds(1), Seconds(2)),
IdentityDimension()])
self.assertRaises(ValueError, lambda: ArrayWithUnits.concat([ts, ts2]))
def test_concatenation_with_matching_freqs_and_duration_results_in_crts(
self):
ts = ArrayWithUnits(np.ones(
(10,
3)), [TimeDimension(Seconds(1), Seconds(2)),
IdentityDimension()])
ts2 = ArrayWithUnits(np.ones(
(13,
3)), [TimeDimension(Seconds(1), Seconds(2)),
IdentityDimension()])
result = ts.concatenate(ts2)
self.assertIsInstance(result, ArrayWithUnits)
self.assertEqual((23, 3), result.shape)
def __new__(cls, array, samplerate):
if array.ndim == 1:
dimensions = [TimeDimension(*samplerate)]
elif array.ndim == 2:
dimensions = [TimeDimension(*samplerate), IdentityDimension()]
else:
raise ValueError(
'array must be one (mono) or two (multi-channel) dimensions')
if not isinstance(samplerate, AudioSampleRate):
raise TypeError('samplerate should be an AudioSampleRate instance')
return ArrayWithUnits.__new__(cls, array, dimensions)
def test_can_slice_time_series_with_open_ended_time_slice(self):
arr = np.arange(10)
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
sl = TimeSlice(None, start=Seconds(2))
ts2 = ts[sl]
self.assertEqual(8, len(ts2))
def test_can_add_constant_factor_to_time_series(self):
arr = np.arange(10)
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
ts2 = ts + 10
self.assertTrue(np.all(np.arange(10, 20) == ts2))
self.assertIsInstance(ts2, ArrayWithUnits)
def test_can_slice_constant_rate_time_series_with_integer_indices(self):
arr = np.arange(10)
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
ts2 = ts[:5]
self.assertEqual(5, len(ts2))
self.assertIsInstance(ts2, ArrayWithUnits)
def test_can_mix_time_slice_and_integer_indices(self):
arr = np.ones((10, 5))
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq), IdentityDimension()])
sl = TimeSlice(duration=Seconds(5), start=Seconds(5))
ts2 = ts[sl, 2:]
self.assertEqual((5, 3), ts2.shape)
def test_can_get_entire_time_series_with_empty_time_slice(self):
arr = np.arange(10)
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
sl = TimeSlice()
ts2 = ts[sl]
self.assertEqual(10, len(ts2))
def test_can_get_entire_time_series_with_empty_slice(self):
arr = np.arange(10)
freq = Seconds(1)
duration = Milliseconds(500)
ts = ArrayWithUnits(arr, [TimeDimension(freq, duration)])
ts2 = ts[:]
self.assertIsInstance(ts2, ArrayWithUnits)
self.assertTrue(np.all(np.arange(10) == ts2))
def test_get_empty_time_series_when_using_out_of_range_time_slice(self):
arr = np.arange(10)
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
sl = TimeSlice(Seconds(2), start=Seconds(11))
ts2 = ts[sl]
self.assertEqual(0, ts2.size)
self.assertIsInstance(ts2, ArrayWithUnits)
def test_discrete_samples_44100(self):
sr = SR44100()
ts = ArrayWithUnits(np.zeros(sr.samples_per_second),
[TimeDimension(*sr)])
hl = HalfLapped()
freq, duration = hl.discrete_samples(ts)
self.assertEqual(1024, freq)
self.assertEqual(2048, duration)
def test_sum_along_second_axis(self):
td = TimeDimension(Seconds(1), Seconds(2))
ts = ArrayWithUnits(np.ones((10, 3)), [td, IdentityDimension()])
result = ts.sum(axis=1)
self.assertIsInstance(result, ArrayWithUnits)
self.assertEqual((10, ), result.shape)
self.assertEqual(1, len(result.dimensions))
self.assertIsInstance(result.dimensions[0], TimeDimension)
def test_time_slice_spanning_multiple_samples_returns_all_samples(self):
arr = np.arange(10)
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
sl = TimeSlice(Milliseconds(2000), start=Milliseconds(1500))
ts2 = ts[sl]
self.assertIsInstance(ts2, ArrayWithUnits)
self.assertEqual(3, ts2.size)
self.assertTrue(np.all(np.arange(1, 4) == ts2))
def test_time_slice_spanning_less_than_one_sample_returns_one_sample(self):
arr = np.arange(10)
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
sl = TimeSlice(Milliseconds(100), start=Milliseconds(1500))
ts2 = ts[sl]
self.assertIsInstance(ts2, ArrayWithUnits)
self.assertEqual(1, ts2.size)
self.assertEqual(1, ts2[0])
def test_frequency_less_than_one(self):
arr = np.arange(10)
freq = Milliseconds(500)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
sl = TimeSlice(Seconds(2), start=Milliseconds(600))
ts2 = ts[sl]
self.assertIsInstance(ts2, ArrayWithUnits)
self.assertEqual(5, ts2.size)
self.assertTrue(np.all(np.arange(1, 6) == ts2))
def test_can_sum_2d_timeseries(self):
arr = np.zeros((10, 3))
freq = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq), IdentityDimension()])
ts2 = ts.sum(axis=1)
self.assertIsInstance(ts2, ArrayWithUnits)
self.assertEqual(1, len(ts2.dimensions))
self.assertEqual(freq, ts2.dimensions[0].frequency)
self.assertEqual(freq, ts2.dimensions[0].duration)
def test_frequency_and_duration_differ3(self):
arr = np.arange(10)
freq = Seconds(1)
duration = Seconds(3)
ts = ArrayWithUnits(arr, [TimeDimension(freq, duration)])
sl = TimeSlice(Seconds(2), start=Seconds(6))
ts2 = ts[sl]
self.assertIsInstance(ts2, ArrayWithUnits)
self.assertEqual(4, ts2.size)
self.assertTrue(np.all(np.arange(4, 8) == ts2))
def test_frequency_less_than_one_freq_and_duration_differ(self):
arr = np.arange(10)
freq = Milliseconds(500)
duration = Seconds(1)
ts = ArrayWithUnits(arr, [TimeDimension(freq, duration)])
sl = TimeSlice(Seconds(3), start=Milliseconds(250))
ts2 = ts[sl]
self.assertIsInstance(ts2, ArrayWithUnits)
self.assertEqual(7, ts2.size)
self.assertTrue(np.all(np.arange(0, 7) == ts2))
def test_duration_less_than_frequency(self):
arr = np.arange(10)
freq = Seconds(1)
duration = Milliseconds(500)
ts = ArrayWithUnits(arr, [TimeDimension(freq, duration)])
sl = TimeSlice(Seconds(3), start=Milliseconds(1250))
ts2 = ts[sl]
self.assertIsInstance(ts2, ArrayWithUnits)
self.assertEqual(4, ts2.size)
self.assertTrue(np.all(np.arange(1, 5) == ts2))
def test_samplerate_three_per_second(self):
arr = np.arange(10)
freq = Milliseconds(333)
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
self.assertEqual(3, int(ts.dimensions[0].samples_per_second))
def test_equals(self):
td1 = TimeDimension(Seconds(1), Milliseconds(900))
td2 = TimeDimension(Seconds(1), Milliseconds(900))
self.assertEqual(td1, td2)
def test_integer_based_slice(self):
td = TimeDimension(*SR44100(), size=44100 * 5)
sl = td.integer_based_slice(TimeSlice(duration=Seconds(1)))
self.assertEqual(slice(0, 44100), sl)
def test_duration_is_equal_to_frequency_if_not_provided(self):
td = TimeDimension(Seconds(1))
self.assertEqual(Seconds(1), td.frequency)
self.assertEqual(Seconds(1), td.duration)
def test_raises_if_duration_is_not_timedelta_instance(self):
self.assertRaises(ValueError, lambda: TimeDimension(Seconds(2), 's'))
def test_raises_if_frequency_is_not_timedelta_instance(self):
self.assertRaises(ValueError, lambda: TimeDimension('s'))
def test_concatenation_with_differing_freqs_and_durations_raises(self):
ts = ArrayWithUnits(np.arange(10),
[TimeDimension(Seconds(1), Seconds(2))])
ts2 = ArrayWithUnits(np.arange(10, 20),
[TimeDimension(Seconds(1), Seconds(1))])
self.assertRaises(ValueError, lambda: ts.concatenate(ts2))
def test_samplerate_audio(self):
arr = np.arange(10)
freq = Picoseconds(int(1e12)) / 44100.
ts = ArrayWithUnits(arr, [TimeDimension(freq)])
self.assertEqual(44100, int(ts.dimensions[0].samples_per_second))