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From | Stas Kolenikov <skolenik@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | st: non-central chi-square? |
Date | Fri, 19 Nov 2010 09:40:51 -0600 |
Question to Stata Corp: Is there any particular reason why there is no density function for chi-square implemented in Stata? Judging from the Wikipedia material, computing the cumulative probability is at least as difficult as computing the density (more difficult as you need to use incomplete gammas vs. exponents), yet the cdf is there (and is important, I've used it a bunch of time), and the pdf is not. -- Stas Kolenikov, also found at http://stas.kolenikov.name Small print: I use this email account for mailing lists only. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/