Re: [R] multinomial test

From: Li,Qinghong,ST.LOUIS,Molecular Biology <Qinghong.Li_at_rdmo.nestle.com>
Date: Thu 23 Feb 2006 - 10:46:39 EST


Thanks Jim. I think my previous posting wasn't clear enough. What I try to do is to compute the probability: f(2,1,3; 2/9, 1/6, 11/18, 6). (If we compute by hand, it is 0.1127). What is the R funtion for doing that?  

I know for binomial tests, there is a function called binom.test. But for multinomial events, is there a similar function in R?  

thanks
Johnny

-----Original Message-----
From: jim holtman [mailto:jholtman@gmail.com] Sent: Wednesday, February 22, 2006 5:33 PM To: Li,Qinghong,ST.LOUIS,Molecular Biology Cc: r-help@stat.math.ethz.ch
Subject: Re: [R] multinomial test

?sample  

sample(1:3, 6, TRUE, prob=c(2/9, 1/6, 11/18))  

On 2/22/06, Li,Qinghong,ST.LOUIS,Molecular Biology < Qinghong.Li@rdmo.nestle.com> wrote:

Hi All,

What is the R function for computing multinomial distribution, e.g. f(2,1,3; 2/9, 1/6, 11/18, 6)?

That is, a total of 6 trials, event 1's p1=2/9, x1=2, event 2's p2=1/6, x2=1, and event 3's p3=11/18, x3=3.

thanks,
Johnny

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