Hi, Thank you. It was that.
Julien. Tal Galili wrote: > > check for missing values. > Tal > > > > On Wed, Sep 23, 2009 at 3:27 PM, pompon <[email protected]> wrote: > >> >> Hi, >> >> I am performing a repeated measures 2-way ANOVA to assess the influence >> of >> plant and leaf on aphid fecundity. Fecundity is measured for each aphid >> on >> a >> single leaf. >> Here is what I typed. >> >> wingless <- reshape(Wingless, >> varying = >> >> list(c("d0","d1","d2","d3","d4","d5","d6","d7","d8","d9","d10","d11","d12","d13","d14","d15","d16")), >> v.names = c("fecundity"), timevar = "time", >> direction = "long") >> >> wingless.aov <- aov(fecundity ~ factor(time) * clip.cage * plant + >> Error(factor(id)), data = wingless) >> >> summary(wingless.aov) >> >> and I obtained >> >> Error: factor(id) >> Df Sum Sq Mean Sq F value Pr(>F) >> factor(time) 4 56.789 14.197 3.0613 0.05925 . >> clip.cage 1 14.149 14.149 3.0509 0.10621 >> plant 1 3.251 3.251 0.7010 0.41880 >> factor(time):clip.cage 1 0.304 0.304 0.0655 0.80240 >> clip.cage:plant 1 17.114 17.114 3.6903 0.07880 . >> Residuals 12 55.652 4.638 >> --- >> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 >> >> Error: Within >> Df Sum Sq Mean Sq F value Pr(>F) >> factor(time) 16 340.83 21.30 11.5222 < 2e-16 *** >> factor(time):clip.cage 16 27.34 1.71 0.9242 0.54195 >> factor(time):plant 16 46.36 2.90 1.5673 0.07783 . >> factor(time):clip.cage:plant 16 24.50 1.53 0.8281 0.65304 >> Residuals 255 471.44 1.85 >> --- >> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 >> >> I don't understand why I have the factor(time) inmy between subject >> results, >> whereas with a similar set of data I don't. >> >> Thank you very much, >> Julien Pompon. >> -- >> View this message in context: >> http://www.nabble.com/repeated-measures-tp25531110p25531110.html >> Sent from the R help mailing list archive at Nabble.com. >> >> ______________________________________________ >> [email protected] 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. >> > > > > -- > ---------------------------------------------- > > > My contact information: > Tal Galili > Phone number: 972-50-3373767 > FaceBook: Tal Galili > My Blogs: > http://www.r-statistics.com/ > http://www.talgalili.com > http://www.biostatistics.co.il > > [[alternative HTML version deleted]] > > ______________________________________________ > [email protected] 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/repeated-measures-tp25531110p25610539.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ [email protected] 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.
