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MathGroup Archive 1998

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Re: PDF (not the format, the function).

  • To: mathgroup at smc.vnet.net
  • Subject: [mg13430] Re: PDF (not the format, the function).
  • From: dreissNOSPAM at nospam.earthlink.net (David Reiss)
  • Date: Thu, 23 Jul 1998 03:33:32 -0400
  • Organization: EarthLink Network, Inc.
  • References: <6ousq5$jj4@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com


This hasn't happened to me, but one possibility that jumps to mind is
that you have possibly defined one of the functions in question  in the
Global` context prior to loading the package... But, in that case I
would expect that you would have seen error messages warnig you of
Shadowing possibilities...


In article <6ousq5$jj4 at smc.vnet.net>, Luis Fernando Medina
<lmedina at leland.Stanford.EDU> wrote:

> After a brief honeymoon with the ContinuousDistributions package, it has
> been happening to me quite often that Mathematica refuses to calculate
> probability density functions. Even more amazingly, sometimes it can
> calculate cumulative distributions but will still remain clueless when
> asked about the PDF. In those cases, if you ask PDF[dist,x], having
> previously defined the "dist" as, say, ExponentialDistribution[1], it
> will make the substitution for "dist" but will not calculate anything,
> simply returning PDF[ExponentialDistribution[1],x]. At the beginning I
> thought it was just a problem of the computer I was working in, but it
> has happened also in other systems as well. Has this happened to
> anybody else? What's going on here?
> 
> Please, to avoid overflow of the newsgroup, answer to my email:
> 
> lmedina at leland.stanford.edu
> 
> Thanks!
> 
> Luis Fernando Medina

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