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Consider using vonmises KDE to estimate head direction rate #1

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lepmik opened this issue Dec 7, 2020 · 0 comments

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lepmik commented Dec 7, 2020

def vonmises_kde(data, kappa=100, n_bins=100):
    from scipy.special import i0
    bins = np.linspace(-np.pi, np.pi, n_bins)
    x = np.linspace(-np.pi, np.pi, n_bins)
    # integrate vonmises kernels
    kde = np.exp(kappa * np.cos(x[:, None] - data[None, :])).sum(1) / (2 * np.pi * i0(kappa))
    kde /= np.trapz(kde, x=bins)
    return bins, kde

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