statsmodels.regression.dimred.PrincipalHessianDirections.fit¶ PrincipalHessianDirections.fit(**kwargs)[source]¶ Estimate the EDR space using PHD. Parameters:¶ residbool, optionalIf True, use least squares regression to remove the linear relationship between each covariate and the response, before conducting PHD. Returns:¶ A results instance which can be used to access the estimated parameters.