Full_Name: Tanya Logvinenko Version: 1.7.0 OS: Windows 2000 Submission from: (NULL) (132.183.156.125)
For unbalanced design, I ran into problem with ANOVA (aov function). The sum of squares for only for the second factor and total are computed correctly, but sum of squares for the first factor is computed incorreclty. Changing order of factors in the formula changes the ANOVA table. For the balanced design, there is no such problem. > summary(aov(data[1,]~factor1+factor2)) Df Sum Sq Mean Sq F value Pr(>F) factor1 5 1524420 304884 6.4529 0.0003229 *** factor2 7 1447830 206833 4.3776 0.0017808 ** Residuals 31 1464674 47248 --- Signif. codes: 0 `***' 0.001 `**' 0.01 `*' 0.05 `.' 0.1 ` ' 1 > summary(aov(data[1,]~factor2+factor1)) Df Sum Sq Mean Sq F value Pr(>F) factor2 7 1648225 235461 4.9836 0.0007295 *** factor1 5 1324025 264805 5.6046 0.0008612 *** Residuals 31 1464674 47248 --- Signif. codes: 0 `***' 0.001 `**' 0.01 `*' 0.05 `.' 0.1 ` ' 1 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-devel