ó
áp7]c           @  sÙ  d  Z  d d l m Z d d l m Z m Z m Z m Z m Z d d l	 Z
 d d g d d g d	 d
 d g g d g g Z d e
 j d ƒ Z d Z d „  Z e e e ƒ ƒ d Z d „  Z d d g d d g d	 d
 d g g d g g Z d d d d g f d d d d g f d d d d g f g f d d g f g f Z e g  e d e d ƒ ƒ D] Z e ^ qOƒ Z e j i d d 6d  d 6d! d 6d" d 6d# d 6d$ d 6ƒ e d% ƒ e e e ƒ ƒ i g  d 6d& d' g d 6d( d' g d 6d) d* g d 6g  d 6d& d' d+ g d 6d& d' d+ g d 6d, g d 6d- d' d. g d 6d/ d' d0 g d 6d' d1 g d 6g  d 6d2 d' d g d 6g  d 6Z e e g  e e ƒ D] Z e D] Z e ^ q‚qxƒ ƒ Z e d3 „  e e ƒ Dƒ ƒ Z e d4 „  e e ƒ Dƒ ƒ Z d S(5   sš   Trying out tree structure for nested logit

sum is standing for likelihood calculations

should collect and aggregate likelihood contributions bottom up

iÿÿÿÿ(   t   print_function(   t	   iteritemst
   itervaluest   lranget   zipt   longNi    i   i   i   i   i   i   i   i   c         C  s•   t  |  d t t f ƒ sC d } x_ |  D] } | t | ƒ 7} q& Wn> t |  ƒ t d |  t |  ƒ ƒ t rw t t |  ƒ St |  ƒ St d |  | ƒ | S(   s   walking a tree bottom-up
    i    s   final branch withs   working on branch(   t
   isinstancet   intR   t   brancht   printt   sumt   testxbt   xb(   t   treet	   branchsumt   b(    (    sL   lib/python2.7/site-packages/statsmodels/sandbox/regression/try_treewalker.pyR      s    

c         C  sÓ   t  |  t ƒ rv |  \ } } t | t | ƒ t d | ƒ t rL t | } n | } xj | D] } | t | ƒ } qY WnI t d „  |  Dƒ ƒ } t d |  d j |  ƒ | ƒ t r² | Sd j |  ƒ St d |  | ƒ | S(   s1   walking a tree bottom-up based on dictionary
    t   subtreec         s  s   |  ] } t  | Vq d  S(   N(   t   data2(   t   .0t   bi(    (    sL   lib/python2.7/site-packages/statsmodels/sandbox/regression/try_treewalker.pys	   <genexpr>@   s    s   final branch witht    s   working on branch(   R   t   tupleR	   R   R   t   branch2R
   t   join(   R   t   nameR   R   R   t	   leavessum(    (    sL   lib/python2.7/site-packages/statsmodels/sandbox/regression/try_treewalker.pyR   /   s     t   topt   B1t   aR   t   B2t   B21t   ct   dt   B22t   et   ft   gt   B3t   ht   abcdefghiè  id   iÈ   i   i   i,  s   
 tree with dictionary datat   constat   pt   constbt   const2t   x2t   timet   x22t   constet   hincet   consttt   hincft   hincgt   consthc         c  s!   |  ] \ } } | | f Vq d  S(   N(    (   R   t   idxR   (    (    sL   lib/python2.7/site-packages/statsmodels/sandbox/regression/try_treewalker.pys	   <genexpr>{   s    c         c  s8   |  ]. \ } } | g  | D] } t  | ^ q f Vq d  S(   N(   t	   paramsidx(   R   t   kt   vt   j(    (    sL   lib/python2.7/site-packages/statsmodels/sandbox/regression/try_treewalker.pys	   <genexpr>~   s    (   t   __doc__t
   __future__R    t   statsmodels.compat.pythonR   R   R   R   R   t   numpyt   npR   t   arangeR   R   R   R	   R   t   tree2t   dictt   iR   t   updatet	   paramsindt   sortedt   setR9   t   paramsnamest	   enumerateR6   t   inddict(    (    (    sL   lib/python2.7/site-packages/statsmodels/sandbox/regression/try_treewalker.pyt   <module>   sP   (-			-.7


8