# multinomial test

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## multinomial test

 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         [[alternative HTML version deleted]] ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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## Re: 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 < [hidden email]> 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 > >        [[alternative HTML version deleted]] > > ______________________________________________ > [hidden email] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html> -- Jim Holtman Cincinnati, OH +1 513 646 9390 What the problem you are trying to solve?         [[alternative HTML version deleted]] ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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## Re: multinomial test

 Qinghong: R Has an extensive Help system which you should learn to use. help.search('multinomial') ?Multinomial Jim: sample() is wrong -- it gives random samples, not probabilities. -- Bert Gunter Genentech Non-Clinical Statistics South San Francisco, CA > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of jim holtman > Sent: Wednesday, February 22, 2006 3:33 PM > To: Li,Qinghong,ST.LOUIS,Molecular Biology > Cc: [hidden email] > 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 < > [hidden email]> 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 > > > >        [[alternative HTML version deleted]] > > > > ______________________________________________ > > [hidden email] mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide! > > http://www.R-project.org/posting-guide.html> > > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What the problem you are trying to solve? > > [[alternative HTML version deleted]] > > ______________________________________________ > [hidden email] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html> ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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## Re: multinomial test

 In reply to this post by Li,Qinghong,ST.LOUIS,Molecular Biology 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:[hidden email]] Sent: Wednesday, February 22, 2006 5:33 PM To: Li,Qinghong,ST.LOUIS,Molecular Biology Cc: [hidden email] 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 < [hidden email]> 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        [[alternative HTML version deleted]] ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html-- Jim Holtman Cincinnati, OH +1 513 646 9390 What the problem you are trying to solve?         [[alternative HTML version deleted]] ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html