Dear Thibault, On Tue, Apr 12, 2011 at 5:06 PM, Thibault Grava <tybo.tout.s...@gmail.com> wrote: > Hello Jay, > > I know that an old post but I really need to calculate KMO for my data and > this is the only thread I found on the subject. > > I'm a very newby to R so sorry for the odd questions. > > It looks like in your reply that you use "kmo" as a function and you apply > it to your data "D"... I tried that on my data but it says "Error: couldn't > find function "kmo"". I installed and loaded the package "corpcor" but it > still doesn't work... did I get it wrong? > > Also i would like to use the complete function (see > http://tolstoy.newcastle.edu.au/R/help/05/12/17235.html), but I don't really > understand how to use it... where should I enter the data directory?? > > I thank you a lot for your help. > > Thibault >
Please forgive me, but I'm not sure I really understand what your question is. My advice would be to go here: https://stat.ethz.ch/pipermail/r-help/2007-August/138049.html and copy-paste the function listed there - it looks like kmo = function( data ){ ...bunch of stuff here... } # end of kmo() into an R session, for instance, on the Windows RGui. If you like, you can test that everything works with the example shown right below that (just copy-paste, again). You don't need any corpcor package, all you need is MASS which should have shipped with the R you are using. You also don't need a data directory. What you need is a matrix (called "X" in my message) with the data stored in the correct order/positions. See the Trujillo-Ortiz et al. discussion (linked in my message) for lots more detail about what the matrix means and how to set it up. If you are having trouble setting up a data matrix in general then I recommend the R documentation which you can find under the Help menu. I just double-checked and both the function and example still work like a charm, almost 4 years later. (?!) Good luck, and I hope this helps. Jay ______________________________ G. Jay Kerns, Ph.D. Youngstown State University http://people.ysu.edu/~gkerns/ ______________________________________________ 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.