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1. ) (score: 1): Author: Christoph Scherber <Christoph.Scherber@uni-jena.de>; Date: Fri, 30 Jan 2004 12:47:41 +0100; Can anyone tell me how S-Plus calculates the gamma function? I would like to write a gamma function for Delphi and would need the exact way in which this function is calculated. Specifically, I need; /archives/html/s-news/2004-01/msg00187.html (7,313 bytes)
2. n (score: 1): Author: Spencer Graves <spencer.graves@pdf.com>; Date: Fri, 30 Jan 2004 04:37:21 -0800; Unless Insightful wants to tell you exactly how they compute the gamma function, you may be out of luck. However, R is open source, and from "www.r-project.org", you can download the source and read; /archives/html/s-news/2004-01/msg00188.html (8,845 bytes)
3. n (score: 1): Author: "Liaw, Andy" <andy_liaw@merck.com>; Date: Fri, 30 Jan 2004 08:10:43 -0500; If you just need some code that computes the gamma (or log-gamma) function, and not necessarily reproduce exactly what Splus does, you can find such info on Guide to Available Mathematical Software (; /archives/html/s-news/2004-01/msg00189.html (8,600 bytes)
4. n (score: 1): Author: "David Smith" <dsmith@insightful.com>; Date: Fri, 30 Jan 2004 10:07:22 -0800; Insightful is quite happy to do so. :) The details are right there in help(gamma): For shape less than 10^8 pgamma(q,shape) is computed using formulae 6.5.31 and 6.5.32 of Abramowitz and Stegun (197; /archives/html/s-news/2004-01/msg00190.html (10,931 bytes)
5. n (score: 1): Author: Prof Brian Ripley <ripley@stats.ox.ac.uk>; Date: Fri, 30 Jan 2004 18:28:02 +0000 (GMT); That's not what help(gamma) gives on my Linux S-PLUS 6.1 system, and it does give help on gamma and not [dpq]gamma (which are in help(GAMMA)). Under Windows, neither give useful information, and I su; /archives/html/s-news/2004-01/msg00191.html (9,045 bytes)
6. n (score: 1): Author: "David Smith" <dsmith@insightful.com>; Date: Fri, 30 Jan 2004 11:24:32 -0800; Yep, this was on S-PLUS 6.2 for Windows. We made several improvements to the distribution functions (and their documentation!) in that release. The same improvements are in the 6.2 Unix version (but; /archives/html/s-news/2004-01/msg00192.html (9,243 bytes)

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