Hallo! I just started working with R to do the statistical analyses for my diploma thesis. I got two sets of data. Both contain repeated measures. One has only one within-subject factor with four levels. The other has one within-subject factor with two levels and one between-factor with two levels. I want to compute a Mauchly test for both sets and a Levene test for the second set. I couldn't find the LEvene test in R. Is it there? I found the mauchly.test but I wasn't able to find out how to compute the error of covariance matrix I need as an argument for mauchly.test. could anybody help me with the correct input I have to give to Mauchly.test so R will give me a test of sphericity out of my data? Thanks in advance! Greetings, Tanja ______________________________________________________________________________ Mit WEB.DE iNews werden Sie ?ber die Ergebnisse der wichtigsten WM-Begegnungen
Tanja Seifried <cinnamon313 at web.de> writes:> Hallo! > > > I just started working with R to do the statistical analyses for my diploma thesis. > I got two sets of data. > Both contain repeated measures. > One has only one within-subject factor with four levels. > The other has one within-subject factor with two levels and one between-factor with two levels. > > I want to compute a Mauchly test for both sets and a Levene test for the second set. > > I couldn't find the LEvene test in R. Is it there?There's one in the "car" package.> I found the mauchly.test but I wasn't able to find out how to compute the error of covariance matrix I need as an argument for mauchly.test. > could anybody help me with the correct input I have to give to Mauchly.test so R will give me a test of sphericity out of my data?Someone already did. This is the first example on the help page for mauchly.test. And generating SSD/Variance matrices is on the help page for SSD. -- O__ ---- Peter Dalgaard ?ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
Hallo thanks a lot for the answer, I found the Levene test in the car package. I already tried to compute my Mauchly.test the same way as in the example(SSD) matrix <- lm(data) mauchly.test(matrix,X=~1) I was just unsure about it because with that I get a different result than when I do the Mauchly test with SPSS... hm thanks again, Tanja> Tanja Seifried <cinnamon313 at web.de> writes: > > > Hallo! > > > > > > I just started working with R to do the statistical analyses for my diploma thesis. > > I got two sets of data. > > Both contain repeated measures. > > One has only one within-subject factor with four levels. > > The other has one within-subject factor with two levels and one between-factor with two levels. > > > > I want to compute a Mauchly test for both sets and a Levene test for the second set. > > > > I couldn't find the LEvene test in R. Is it there? > > There's one in the "car" package. > > > I found the mauchly.test but I wasn't able to find out how to compute the error of covariance matrix I need as an argument for mauchly.test. > > could anybody help me with the correct input I have to give to Mauchly.test so R will give me a test of sphericity out of my data? > > Someone already did. This is the first example on the help page for > mauchly.test. And generating SSD/Variance matrices is on the help page > for SSD. > > -- > O__ ---- Peter Dalgaard ?ster Farimagsgade 5, Entr.B > c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K > (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 > ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907