Re: Evaluating integrals
- To: mathgroup at smc.vnet.net
- Subject: [mg66419] Re: Evaluating integrals
- From: Paul Abbott <paul at physics.uwa.edu.au>
- Date: Thu, 11 May 2006 05:36:20 -0400 (EDT)
- Organization: The University of Western Australia
- References: <e3hf47$m09$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In article <e3hf47$m09$1 at smc.vnet.net>, Bill Rowe <readnewsciv at earthlink.net> wrote: > On 5/5/06 at 5:03 AM, chris.chiasson at gmail.com (Chris Chiasson) > wrote: > > >RE: the below commands Given the ouput of the second command, why > >does the third work? > > ><<Statistics` > >Information[ExpectedValue] > >ExpectedValue[Function[c,Exp[-r b c]],NormalDistribution[mu,s]] > > My *guess* would be that one of packages other than > Statistics`DescriptiveStatistics` has added additional definitions for > ExpectedValue without modifying the help message provided by > Statistics`DescriptiveStatistics` for ExpectedValue. I haven't actually > reviewed the code inside the packages for ExpectedValue to either confirm or > deny my guess. When you load the statistics stub via << Statistics` and then do ?ExpectedValue the message for ExpectedValue in Statistics`DescriptiveStatistics` is returned. Now, if you explicitly load << Statistics`ContinuousDistributions` and then do ?ExpectedValue then the message for ExpectedValue in this latter package, is returned. This latter message covers both the discrete and continuous cases. Cheers, Paul _______________________________________________________________________ Paul Abbott Phone: 61 8 6488 2734 School of Physics, M013 Fax: +61 8 6488 1014 The University of Western Australia (CRICOS Provider No 00126G) AUSTRALIA http://physics.uwa.edu.au/~paul