KNN bandwidth

knn_bandwidth(x: ndarray, k: int | None = None) → float

Compute the k-nearest neighbor bandwidth for a 1D array.

Parameters:

• x (np.ndarray) – 1D array of data points

• k (Optional[int]) – number of nearest neighbors to consider. If k is None or less than 1, it will be set to the square root of the number of points.

Returns:

• bandwidth value

Return type:

float