# statsmodels.robust.norms.LeastSquares¶

class statsmodels.robust.norms.LeastSquares[source]

Least squares rho for M-estimation and its derived functions.

Methods

 Returns the value of estimator rho applied to an input The psi function for the least squares estimator The derivative of the least squares psi function. The least squares estimator rho function The least squares estimator weighting function for the IRLS algorithm.