Heaviside

Heaviside surrogate gradient.

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import torch
import sinabs.activation as sina
import matplotlib.pyplot as plt

x = torch.linspace(-0.5, 3.5, 500)
plt.plot(x, sina.Heaviside(window=0.5)(v_mem=x, spike_threshold=1.0), label="Heaviside")
plt.xlabel("Neuron membrane potential")
plt.ylabel("Derivative")
plt.legend()