M/Ph ,dZddlZGddZdS)zM Created on Tue May 27 13:23:24 2014 Author: Josef Perktold License: BSD-3 Nc*eZdZdZddZdZdZeZdS) StandardizeTransformaBclass to reparameterize a model for standardized exog Parameters ---------- data : array_like data that is standardized along axis=0 ddof : None or int degrees of freedom for calculation of standard deviation. default is 1, in contrast to numpy.std const_idx : None or int If None, then the presence of a constant is detected if the standard deviation of a column is **equal** to zero. A constant column is not transformed. If this is an integer, then the corresponding column will not be transformed. demean : bool, default is True If demean is true, then the data will be demeaned, otherwise it will only be rescaled. Notes ----- Warning: Not all options are tested and it is written for one use case. API changes are expected. This can be used to transform only the design matrix, exog, in a model, which is required in some discrete models when the endog cannot be rescaled or demeaned. The transformation is full rank and does not drop the constant. NTctj|}|d|_|dd|_|Ztj|jdkd}t |dkrd}n!ttj|}|dkrd|j|<d|j|<|durd|_||_ dS)Nrr)ddofnF) npasarraymeanstdscalenonzerolenintsqueeze const_idx)selfdatarrdemeans a/var/www/html/test/jupyter/venv/lib/python3.11/site-packages/statsmodels/tools/transform_model.py__init__zStandardizeTransform.__init__*sz$IIaLL XXaaX((    4:?33A6I9~~""  9 5 566   #$DIi $%DJy ! U??DI"c|jtj||jz Stj||jz |jz S)z=standardize the data using the stored transformation )r r r r )rrs r transformzStandardizeTransform.transform@sA 9 :d##dj0 0Jt$$ty0DJ> >rc||jz }|jdkr/||jxx||jzzcc<|S)aeTransform parameters of the standardized model to the original model Parameters ---------- params : ndarray parameters estimated with the standardized model Returns ------- params_new : ndarray parameters transformed to the parameterization of the original model r)r rr sum)rparams params_news rtransform_paramsz%StandardizeTransform.transform_paramsIsTdj( >S t~ & & &: +A*F*F*H*H H & & &r)rNT)__name__ __module__ __qualname____doc__rrr__call__rrrr sQ:####,???*HHHrr)r#numpyr rr%rrr'sYRRRRRRRRRRr