def _create_controls(self):
self._freq_ax = plt.axes([0.2, 0.19, 0.2, 0.03])
self._freq_slider = Slider(self._freq_ax,
'Frequency',
0,
self.samplerate / 2.0,
valinit = self.frequency)
self._freq_slider.on_changed(self.set_signal_frequency)
self._ampl_ax = plt.axes([0.2, 0.1, 0.2, 0.03])
self._ampl_slider = Slider(self._ampl_ax,
'Amplitude',
-100,
0,
valinit = dcv.lin2db(self.amplitude))
self._ampl_slider.on_changed(self.set_signal_amplitude)
self._signaltype_ax = plt.axes([0.5, 0.05, 0.15, 0.20])
self._signaltype_radio = RadioButtons(self._signaltype_ax,
('Sine', 'Square', 'Sawtooth',
'Triangle', 'Noise', 'Constant'))
self._signaltype_radio.on_clicked(self.set_signal_type)
self._windowtype_ax = plt.axes([0.7, 0.05, 0.15, 0.20])
self._windowtype_radio = RadioButtons(self._windowtype_ax,
('Flat', 'Hanning', 'Hamming', 'Blackman'))
self._windowtype_radio.on_clicked(self.set_window_type)
def amplitude_response(spec_real, spec_imag, db=True):
size = len(spec_real)
amp = [0] * size
for i in range(0, size):
amp[i] = dcx.modulus(spec_real[i], spec_imag[i]) / (size/2)
if db:
amp[i] = dcv.lin2db(amp[i])
return amp
def test_one(self):
self.assertEqual(dc.lin2db(1.0), 0.0)
def test_min_limit(self):
self.assertEqual(dc.lin2db(1e-5), -100.0)
def test_minus_inf(self):
self.assertEqual(dc.lin2db(1e-10), -100.0)