Experimentian with Bayesian statistics
- To: mathgroup at smc.vnet.net
- Subject: [mg45377] Experimentian with Bayesian statistics
- From: NA <nospam at here.com>
- Date: Sun, 4 Jan 2004 04:56:09 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hi, I'm trying to learn some basic Bayesian statistics with Mathematica but I'm having trouble building up the probability formulae that I need. I tried to define depPr[x_,y_] := (Pr[x] depPr[y,x]) / Pr[y] but I don't even get an Out result (I thought it would have at least redisplayed it with numerator over denominator) (I assumed by the way that I needed a different name for the function Pr{x | y} vs the simple Pr{x}) If I replace the ':=' with '=', then I just get a recursion error. I've looked around on the web but there doesn't seem to be very much out there on doing probability with Mathematica Once I get this working, then I want to extend it (symbolically) so that I can work with sequences of events, i.e. Pr{Xi | Y} = Pr{Xi}*Pr{Y|Xi} ------------------------------------------------------------------------ Sigma(Pr{Xi}*Pr{Y|Xi}, 1, n) and then create lists of items to run through it. Bit difficult when I can't even get the basics running. Any suggestions would be appreciated, Thanks, Jen B. -- _______