statsmodels.robust.norms.LeastSquares.psi¶
-
LeastSquares.
psi
(z)[source]¶ The psi function for the least squares estimator
The analytic derivative of rho
- Parameters
- zarray_like
1d array
- Returns
- psi
ndarray
psi(z) = z
- psi
LeastSquares.
psi
(z)[source]¶The psi function for the least squares estimator
The analytic derivative of rho
1d array
ndarray
psi(z) = z