57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
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from stimuli.SinusoidalStepStimulus import SinusoidalStepStimulus
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from stimuli.SinusAmplitudeModulation import SinusAmplitudeModulationStimulus
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import numpy as np
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import matplotlib.pyplot as plt
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def main():
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stimuli_protocol_examples()
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pass
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def stimuli_protocol_examples():
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fig, axes = plt.subplots(2, 1)
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start = 0
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end = 1
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time_start = -0.2
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time_end = 1.2
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step_size = 0.00005
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frequency = 55
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contrast = 0.5
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# Sinusoidal STEP stimulus
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# frequency, contrast, start_time=0, duration=np.inf, amplitude=1
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step_stim = SinusoidalStepStimulus(frequency, contrast, start, end - start)
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values = step_stim.as_array(time_start, time_end - time_start, step_size)
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time = np.arange(time_start, time_end, step_size)
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axes[0].plot(time, values)
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axes[0].set_ylabel("Voltage [mV]")
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# SAM Stimulus:
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mod_freq = 10
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step_stim = SinusAmplitudeModulationStimulus(frequency, contrast, mod_freq, start, end - start)
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values = step_stim.as_array(time_start, time_end - time_start, step_size)
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time = np.arange(time_start, time_end, step_size)
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plt.plot(time, values)
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beat_time = np.arange(start, end, step_size)
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beat_values = np.sin(beat_time * 2 * np.pi * mod_freq) * contrast + 1
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axes[1].plot(beat_time, beat_values)
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axes[1].set_xlabel("Time [s]")
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axes[1].set_ylabel("Voltage [mV]")
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plt.savefig("thesis/figures/stimuliExamples.pdf")
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plt.close()
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if __name__ == '__main__':
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main() |