'YHh $dZddlZGddZy)zM Created on Tue May 27 13:23:24 2014 Author: Josef Perktold License: BSD-3 Nc(eZdZdZddZdZdZeZy)StandardizeTransformaBclass to reparameterize a model for standardized exog Parameters ---------- data : array_like data that is standardized along axis=0 ddof : None or int degrees of freedom for calculation of standard deviation. default is 1, in contrast to numpy.std const_idx : None or int If None, then the presence of a constant is detected if the standard deviation of a column is **equal** to zero. A constant column is not transformed. If this is an integer, then the corresponding column will not be transformed. demean : bool, default is True If demean is true, then the data will be demeaned, otherwise it will only be rescaled. Notes ----- Warning: Not all options are tested and it is written for one use case. API changes are expected. This can be used to transform only the design matrix, exog, in a model, which is required in some discrete models when the endog cannot be rescaled or demeaned. The transformation is full rank and does not drop the constant. Nctj|}|jd|_|jdd|_|Ttj |jdk(d}t |dk(rd}nttj|}|dk7rd|j|<d|j|<|durd|_||_ y)Nr)ddofnF) npasarraymeanstdscalenonzerolenintsqueeze const_idx)selfdatarrdemeans Z/var/www/html/planif/env/lib/python3.12/site-packages/statsmodels/tools/transform_model.py__init__zStandardizeTransform.__init__*szz$IIaL XXaaX(    4::?3A6I9~"  9 56  #$DIIi $%DJJy ! U?DI"c|j"tj||jz Stj||jz |jz S)z=standardize the data using the stored transformation )r r r r )rrs r transformzStandardizeTransform.transform@sG 99 ::d#djj0 0JJt$tyy0DJJ> >rc||jz }|jdk7r2||jxx||jzjzcc<|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_paramsIsJdjj( >>S t~~ &: +A*F*F*H H &r)rNT)__name__ __module__ __qualname____doc__rrr__call__rrrr s:#,?*Hrr)r#numpyr rr%rrr'sRRr