def test_sin(self):
"""Test sine wave."""
amp = 0.5
period = 5
freq = 1 / period
samples = 101
times = np.linspace(0, 10, samples)
sin_arr = continuous.sin(times, amp=amp, freq=freq)
# with new phase
sin_arr_phased = continuous.sin(times,
amp=0.5,
freq=1 / 5,
phase=np.pi / 2)
self.assertEqual(sin_arr.dtype, np.complex_)
# Assert starts at 1
self.assertAlmostEqual(sin_arr[0], 0.0)
self.assertAlmostEqual(sin_arr[6], 0.3427, places=2)
self.assertAlmostEqual(sin_arr[25], 0.0)
self.assertAlmostEqual(sin_arr[13], amp, places=2)
self.assertAlmostEqual(sin_arr_phased[0], amp)
# Assert bounded between -amp and amp
self.assertTrue(np.all((-amp <= sin_arr) & (sin_arr <= amp)))
self.assertEqual(len(sin_arr), samples)
def test_sin(self):
"""Test discrete sampled sine wave."""
amp = 0.5
period = 5
freq = 1/period
duration = 10
times = np.arange(0, duration) + 0.5
sin_ref = continuous.sin(times, amp=amp, freq=freq)
sin_pulse = library.sin(duration, amp=amp, freq=freq)
self.assertIsInstance(sin_pulse, Waveform)
np.testing.assert_array_equal(sin_pulse.samples, sin_ref)
# test single cycle
cycle_freq = 1/duration
sin_cycle_ref = continuous.sin(times, amp=amp, freq=cycle_freq)
sin_cycle_pulse = library.sin(duration, amp=amp)
np.testing.assert_array_almost_equal(sin_cycle_pulse.samples, sin_cycle_ref)
