Dear Dr. Andrew Robinson: Thanks for your reply. In my data, subject is nested within sequence. According to Dr. Christoph's reply, I have change the sequence data. It seems not work in R. However, I am sure that I run the same data with GLM in SPSS that I posted in first time. I really do not know where the problem is. How can I do?
Best regards, Hsin-Ya Andrew Robinson-6 wrote: > > In your data, subject is nested within sequence. Was that your > intention? > >> a<-c(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,14,14) >> b<-c(1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2) >> c<-c(2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2) >> d<-c(2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1) >> e<-c(1739,1633,1481,1837,1780,2073,1374,1629,1555,1385,1756,1522,1566,1643, > + 1939,1615,1475,1759,1388,1483,1127,1682,1542,1247,1235,1605,1598,1718 > + ) >> Data<-data.frame(subject=as.factor(a), > + drug=as.factor(b), period=as.factor(c), > + sequence=as.factor(d), Max=e) >> Data > subject drug period sequence Max > 1 1 1 2 2 1739 > 2 1 2 1 2 1633 > 3 2 1 1 1 1481 > 4 2 2 2 1 1837 > 5 3 1 2 2 1780 > 6 3 2 1 2 2073 > 7 4 1 1 1 1374 > 8 4 2 2 1 1629 > 9 5 1 2 2 1555 > 10 5 2 1 2 1385 > 11 6 1 1 1 1756 > 12 6 2 2 1 1522 > 13 7 1 2 2 1566 > 14 7 2 1 2 1643 > 15 8 1 1 1 1939 > 16 8 2 2 1 1615 > 17 9 1 2 2 1475 > 18 9 2 1 2 1759 > 19 10 1 1 1 1388 > 20 10 2 2 1 1483 > 21 11 1 2 2 1127 > 22 11 2 1 2 1682 > 23 12 1 1 1 1542 > 24 12 2 2 1 1247 > 25 13 1 2 2 1235 > 26 13 2 1 2 1605 > 27 14 1 1 1 1598 > 28 14 2 2 1 1718 > > > > Andrew > > > On Thu, Jun 19, 2008 at 04:29:16PM +0800, leeznar wrote: >> Dear R-users: >> >> I am a new R-user and I have a question about lm >> function. Here is my data. >> a<-c(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,14,14) >> b<-c(1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2) >> c<-c(2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2) >> d<-c(2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1) >> e<-c(1739,1633,1481,1837,1780,2073,1374,1629,1555,1385,1756,1522,1566,1643,1939,1615,1475,1759,1388,1483,1127,1682,1542,1247,1235,1605,1598,1718 >> ) >> Data<-data.frame(subject=as.factor(a), >> drug=as.factor(b), period=as.factor(c), >> sequence=as.factor(d), Max=e) >> >> lm3<- lm(Max ~subject*sequence + sequence + period + >> drug, data=Data) >> print(lm3) >> anova(lm3) >> >> When I use lm to fit the data, there are some problems >> in ??subject*sequence??. I have use GLM in SPSS to >> fit the same data, and it seems there is no problem. >> >> I don??t know where my problem is. How can I get the >> same result with SPSS? How can I do? >> >> Best regards, >> Hsin-Ya Lee >> >> >> >> >> >> ______________________________________________________________________________________________________ >> [[elided Yahoo spam]] >> Content-Type: application/msword; name="Result_SPSS.doc" >> Content-Transfer-Encoding: base64 >> Content-Description: 3367377201-Result_SPSS.doc >> Content-Disposition: attachment; filename="Result_SPSS.doc" >> >> AAAAAAAAAAAA >> > >> ______________________________________________ >> 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. > > > -- > Andrew Robinson > Department of Mathematics and Statistics Tel: +61-3-8344-6410 > University of Melbourne, VIC 3010 Australia Fax: +61-3-8344-4599 > http://www.ms.unimelb.edu.au/~andrewpr > http://blogs.mbs.edu/fishing-in-the-bay/ > > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/Problems-with-lm%28%29-tp17999900p18041445.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.
