ó áp7]c @s[dZddlmZddlZd„Zd„ZejdƒZejdƒZ ejdƒZ ejd ƒZ ejd ƒZ ejd ƒZ ejd ƒZejee ee ƒƒje ƒZeejeƒƒeejejejed dƒƒeƒƒeeje d dejd e e dƒe ƒƒejeje d dƒƒejeje dƒƒdeje ejƒZe ddejde ede e ƒdeje ƒZe ddejde de ƒdZeeZeeje ƒƒeeje ƒƒeeje ƒZeeƒeejeƒƒedƒx1ejeƒdD]\ZZeedeƒqvWeejeƒd dƒedƒeeZeeje ƒƒeeje ƒƒedƒeeje d d dd ddd dƒƒƒeeje d d dd ddd dƒƒj!ƒƒdS(s9 Created on Sat Mar 13 07:56:22 2010 Author: josef-pktd iÿÿÿÿ(tprint_functionNcCs>d|tjdtjƒtj||d d|dƒS(s=Return the probability density function as an expression in xii(tsytsqrttpitexp(txtmutsigma((sHlib/python2.7/site-packages/statsmodels/sandbox/regression/sympy_diff.pytpdf scCs*dtj|||tjdƒƒdS(s<Return the cumulative density function as an expression in xii(RterfR(RRR((sHlib/python2.7/site-packages/statsmodels/sandbox/regression/sympy_diff.pytcdfsRRtsigma2Rtytdftsiig@gà?gð?s0 derivative of loglike of t distribution wrt dfit=s( standard t distribution, dll_df, dll_dys gø?gŽuq $@("t__doc__t __future__RtsympyRRR tSymbolRRR RR R RtlogtdifftdldxnormtprinttsimplifytgammaRttllf1ttllf2ttllf2stdttllftdlddftcsetktvttllfstdtsubstdicttevalf(((sHlib/python2.7/site-packages/statsmodels/sandbox/regression/sympy_diff.pytsF   $07R@+       .