Services & Resources / Wolfram Forums
MathGroup Archive
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2004

[Date Index] [Thread Index] [Author Index]

Search the Archive

problem with ExpectedValue[xx-x, PoissonDistribution[m],x]

  • To: mathgroup at
  • Subject: [mg50126] problem with ExpectedValue[xx-x, PoissonDistribution[m],x]
  • From: W Randolph Franklin <math at>
  • Date: Mon, 16 Aug 2004 06:45:32 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

(This is a repeat of my posting of Aug 5, since there were no
replies, and I am still interested in the answer.)

Why can Mathematica not evaluate 

ExpectedValue[x x  -  x, PoissonDistribution[m], x]


It can correctly evaluate all the following:

ExpectedValue[x x , PoissonDistribution[m], x]
ExpectedValue[x  , PoissonDistribution[m], x]
ExpectedValue[x  x  + x , PoissonDistribution[m], x]
ExpectedValue[x  x  + a x , PoissonDistribution[m], x]

Is it anticipating to think that I've found a Mathematica bug,
in my first hour of using Mathematica?  (If so, that's rather
good for me and new SW packages).


remove the NOSPAM to reply

  • Prev by Date: Re: x-ArcSin[Sin[x]]
  • Next by Date: Re: raw image file
  • Previous by thread: problem with ExpectedValue[xx-x, PoissonDistribution[m],x]
  • Next by thread: Problem with eval. of neg. cube root of neg. #