Re: Problem with Distribution Functions
- To: mathgroup at smc.vnet.net
- Subject: [mg84813] Re: [mg84790] Problem with Distribution Functions
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Tue, 15 Jan 2008 03:19:59 -0500 (EST)
- Reply-to: hanlonr at cox.net
Prior to v6 you need to load a package. $Version 5.2 for Mac OS X (June 20, 2005) Needs["Statistics`"]; Variance[GammaDistribution[a,b]] a*b^2 With v6 the functions have been integrated. $Version 6.0 for Mac OS X x86 (32-bit) (June 19, 2007) Variance[GammaDistribution[a, b]] a*b^2 Bob Hanlon ---- Stephan Heckmueller <stephan.heckmueller at gmx.net> wrote: > Hello, > I have a little problem with Mathematica's statistical > distributions. These seem not to be evauluated properly. > For example the documentation says that > Variance[GammaDistribution[a,b]] should be evaluated to > ab^2. In my worksheets I simply get: > Variance[GammaDistribution[a,b]]. There are no errors > or warnings whatsoever. > > Is there some package missing do I have to call the > needs function in advance? > > Thanks. >