Re: NEED HELP! Mathematica seems to "forget" that a package has been loaded

*To*: mathgroup at smc.vnet.net*Subject*: [mg26495] Re: [mg26487] NEED HELP! Mathematica seems to "forget" that a package has been loaded*From*: BobHanlon at aol.com*Date*: Thu, 28 Dec 2000 21:31:29 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

You did not give any examples so I will just give you some examples to check your syntax. Needs["Statistics`DiscreteDistributions`"]; dist = PoissonDistribution[mu]; Sum[PDF[dist, x], {x, Sequence @@ Domain[dist]}] 1 Mean[dist] == Sum[x*PDF[dist, x], {x, Sequence @@ Domain[dist]}] True {PDF[dist, x], CDF[dist, x], Variance[dist], PDF[PoissonDistribution[7], 10]} {mu^x/(E^mu*x!), GammaRegularized[Floor[x] + 1, mu], mu, 40353607/(518400*E^7)} N[PDF[PoissonDistribution[7], 5]] 0.12771666829228964 Bob Hanlon In a message dated 12/28/00 3:40:42 AM, raygunprez at earthlink.net writes: >I am still relatively new to the Mathematica environment, so I please >request that you have some patience. > >I am encountering a situation where when I issue the command ><<Statistics`DiscreteDistributions` and attempt to use any of the >functions therein that during the evaluation of that cell that it does > >NOT evaluate to a numerical answer. > >This is just one example but there are several other packages such as >Graphics and Geometry where this is the case...Mathematica responds that > >such package has loaded. However, the functions don't evaluate. > >If you happen to know of any tips, tricks, or procedures to overcome >this I would truly appreciate it. >