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From |
Jason Rosenberg <RSNJAS002@myuct.ac.za> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
RE: st: gamma |

Date |
Thu, 11 Oct 2012 12:45:47 +0000 |

When I type in: help gamma, I get: Out-of-date command As of Stata 8.0, the cox, weibull[het], lnormal[het], gamma[het], llogist, llogistic[het], ereg[het], and gompertz[het] commands are out of date. The replacement for cox is stcox. The replacement for weibull[het], lnormal[het], gamma[het], llogist, llogistic[het], ereg[het], and gompertz[het] is streg. I read through those but to no avail. In any case I used R to do the gamma part. If possible could you tell how to run this for a continuous variable in place of the 6, I did it for discreet variables, as in: egen number = seq() then: gen prob=(v/gamma(alpha/v))*(beta^(2*alpha)/(number+11.2)^(alpha+1))*exp(-(beta^2/(number+11.2))^v) but I need a curve instead of a simple scatter plot. If you could direct me to the relevant help files that would suffice.. ________________________________________ From: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] on behalf of Nick Cox [njcoxstata@gmail.com] Sent: Thursday, October 11, 2012 12:31 PM To: statalist@hsphsun2.harvard.edu Subject: Re: st: gamma There is no function -gamma()-, largely I suspect because its values become very big. There is a function -lngamma()-, so you would need -exp(lngamma())-. Almost all of this can be established by looking at the help for -functions-. Nick On Thu, Oct 11, 2012 at 1:25 PM, Jason Rosenberg <RSNJAS002@myuct.ac.za> wrote: > hi > I an attempting to put this equation into stata: > > gen prob=(v/gamma(alpha/v))*(beta^(2*alpha)/(6+11.2)^(alpha+1))*exp(-(beta^2/(6+11.2))^v) > where v, alpha, and beta are predefined my the user > and I get : > unknown function gamma() > > Is there another syntax I should know for gamma? > ### UNIVERSITY OF CAPE TOWN This e-mail is subject to the UCT ICT policies and e-mail disclaimer published on our website at http://www.uct.ac.za/about/policies/emaildisclaimer/ or obtainable from +27 21 650 9111. This e-mail is intended only for the person(s) to whom it is addressed. If the e-mail has reached you in error, please notify the author. If you are not the intended recipient of the e-mail you may not use, disclose, copy, redirect or print the content. If this e-mail is not related to the business of UCT it is sent by the sender in the sender's individual capacity. ### > > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/ ### UNIVERSITY OF CAPE TOWN This e-mail is subject to the UCT ICT policies and e-mail disclaimer published on our website at http://www.uct.ac.za/about/policies/emaildisclaimer/ or obtainable from +27 21 650 9111. This e-mail is intended only for the person(s) to whom it is addressed. If the e-mail has reached you in error, please notify the author. If you are not the intended recipient of the e-mail you may not use, disclose, copy, redirect or print the content. If this e-mail is not related to the business of UCT it is sent by the sender in the sender's individual capacity. ### * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: gamma***From:*Maarten Buis <maartenlbuis@gmail.com>

**Re: st: gamma***From:*Nick Cox <njcoxstata@gmail.com>

**References**:**st: gamma***From:*Jason Rosenberg <RSNJAS002@myuct.ac.za>

**Re: st: gamma***From:*Nick Cox <njcoxstata@gmail.com>

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