HuberT.
weights
Huber’s t weighting function for the IRLS algorithm
The psi function scaled by z
z : array_like
1d array
weights : ndarray
weights(z) = 1 for |z| <= t weights(z) = t/|z| for |z| > t
weights(z) = 1 for |z| <= t
weights(z) = t/|z| for |z| > t