Just what null hypothesis are you trying to test or what question are you trying to answer by comparing 2 matrices of different size?
I think you need to figure out what your real question is before worrying about which test might work on it. Trying to get your data to fit a given test rather than finding the appropriate test or other procedure to answer your question is like buying a new suit then having plastic surgery to make you fit the suit rather than having the tailor modify the suit to fit you. If you can give us more information about what your question is we have a better chance of actually helping you. On Fri, Mar 9, 2012 at 9:46 AM, aoife doherty <aaral.si...@gmail.com> wrote: > > Thank you. Can the chi-squared test compare two matrices that are not the > same size, eg if matrix 1 is a 2 X 4 table, and matrix 2 is a 3 X 5 matrix? > > > > On Fri, Mar 9, 2012 at 4:37 PM, Greg Snow <538...@gmail.com> wrote: >> >> The chi-squared test is one option (and seems reasonable to me if it >> the the proportions/patterns that you want to test). One way to do >> the test is to combine your 2 matrices into a 3 dimensional array (the >> abind package may help here) and test using the loglin function. >> >> On Thu, Mar 8, 2012 at 5:46 AM, aaral singh <aaral.si...@gmail.com> wrote: >> > Hi.Please help if someone can. >> > >> > Problem: >> > I have 2 matrices >> > >> > Eg >> > >> > matrix 1: >> > Freq None Some >> > Heavy 3 2 5 >> > Never 8 13 8 >> > Occas 1 4 4 >> > Regul 9 5 7 >> > >> > matrix 2: >> > Freq None Some >> > Heavy 7 1 3 >> > Never 87 18 84 >> > Occas 12 3 4 >> > Regul 9 1 7 >> > >> > >> > I want to see if matrix 1 is significantly different from matrix 2. I >> > consider using a chi-squared test. Is this appropriate? >> > Could anyone advise? >> > Many thank you. >> > Aaral Singh >> > >> > -- >> > View this message in context: >> > http://r.789695.n4.nabble.com/help-please-2-tables-which-test-tp4456312p4456312.html >> > Sent from the R help mailing list archive at Nabble.com. >> > >> > ______________________________________________ >> > 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. >> >> >> >> -- >> Gregory (Greg) L. Snow Ph.D. >> 538...@gmail.com >> >> ______________________________________________ >> 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. > > -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com ______________________________________________ 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.
