R can usually do almost anything but if the function exists I am not aware of it. Sorry. I did misunderstand what you were doing.
John Kane Kingston ON Canada > -----Original Message----- > From: bogaso.christo...@gmail.com > Sent: Sat, 01 Dec 2012 19:33:09 +0545 > To: jrkrid...@inbox.com > Subject: Re: [R] Getting all possible contingency tables > > Thanks John for your reply. However still not clear how I should proceed. > > My goal is to generate all possible contingency tables. Basically I want > to see the distribution of Chi-squared Statistic under independence > (NULL). > > So I was thinking if I can generate all possible permutation of integer > numbers having sum equal to (8 + 10 + 12 + 6) = 36. Is there any R > function to do that? > > Thanks and regards, > > > On 01-12-2012 18:39, John Kane wrote: >> Are you basically asking for all possible permutations of the table? If >> so see ?permn in the combinat package. >> >> John Kane >> Kingston ON Canada >> >> >>> -----Original Message----- >>> From: bogaso.christo...@gmail.com >>> Sent: Sat, 01 Dec 2012 18:10:15 +0545 >>> To: r-help@r-project.org >>> Subject: [R] Getting all possible contingency tables >>> >>> Hello all, >>> >>> Let say I have 2-way contingency table: >>> >>> Tab <- matrix(c(8, 10, 12, 6), nr = 2) >>> >>> and the Chi-squared test could not reject the independence: >>> >>> > chisq.test(Tab) >>> >>> Pearson's Chi-squared test with Yates' continuity correction >>> >>> data: Tab >>> X-squared = 1.0125, df = 1, p-value = 0.3143 >>> >>> >>> However I want to get all possible contingency tables under this >>> independence scenario (one of them would obviously be the given table >>> as, we could not reject the independence), and for each such table I >>> want to calculate the Ch-sq statistic. >>> >>> Can somebody help me how to generate all such tables? >>> >>> Thanks and regards, >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >> ____________________________________________________________ >> FREE ONLINE PHOTOSHARING - Share your photos online with your friends >> and family! >> Visit http://www.inbox.com/photosharing to find out more! >> >> >> ____________________________________________________________ FREE 3D EARTH SCREENSAVER - Watch the Earth right on your desktop! ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.