algorithm mistake

[qingchuwudi]

The Gaussian Kernal algorithm in your code has a mistake:

def gaussian_kernel(distance, bandwidth):
    return (1 / (bandwidth * np.sqrt(2 * np.pi))) * np.exp(-0.5 * ((distance / bandwidth)) ** 2)

Where (1 / (bandwidth * np.sqrt(2 * np.pi))) * np.exp(-0.5 * ((distance / bandwidth)) ** 2) should be
(1 / (bandwidth * np.sqrt(2 * np.pi))) * np.exp(-0.5 * ((distance / bandwidth)** 2) ).

-0.5 * ((distance / bandwidth)) ** 2 -> -0.5 * ((distance / bandwidth)** 2)

Reference

• Radial_basis_function_kernel--wiki