[R] Wide confidence intervals or Error message in a mixed effects model (nlme)

for analyzing the data are greatly appreciated. Thank you very much, Menelaos Menelaos Stavrinides Lecturer, Dept. of Agricultural Sciences Cyprus University of Technology P.O. Box 50329, 3603 Limassol, Cyprus Tel.: + 357 25002186 Fax: + 357 25002767 Email: m.stavrini...@cut.ac.cy

[R] Analysis of unbalanced data in nlme or car

package [model-aov(growth.rate~pestA*pestB+Error(block))], but when I run Anova(model,type=c(3)) I get the following error message: Error in as.data.frame.default(data, optional = TRUE) : cannot coerce class 'function' into a data.frame Thank you very much, Menelaos Stavrinides Lecturer

[R] model simplification in lme

it if it is not significant? I know this in not a valid approach in lm but I am not sure about lme. Thanks to Kingsford for pointing out the section in Pinheiro and Bates about model simplification. Thanks, Mel -- Menelaos Stavrinides Ph.D. Candidate Environmental Science, Policy and Management 137

[R] lme anova() and model simplification

Levels: lpsm06 lpsm07 lwsm06 lwsm07 mpsm06 mpsm07 mwsm06 mwsm07 -- Menelaos Stavrinides Ph.D. Candidate Environmental Science, Policy and Management 137 Mulford Hall MC #3114 University of California Berkeley, CA 94720-3114 USA Tel: 510 717 5249 [[alternative HTML version deleted

[R] Unrealistic dispersion parameter for quasibinomial

of freedom AIC: NA Number of Fisher Scoring iterations: 8 Thanks, Mel -- Menelaos Stavrinides Ph.D. Candidate Environmental Science, Policy and Management 137 Mulford Hall MC #3114 University of California Berkeley, CA 94720-3114 USA Tel: 510 717 5249 [[alternative HTML version deleted

[R] Type I and Type III SS in anova

-16 *** sex 0.00023 1 6.2851 0.01303 * temp:sex0.00015 3 1.4073 0.24206 Residuals 0.00683 187 --- Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 -- Menelaos Stavrinides Ph.D. Candidate Environmental Science, Policy and Management 137 Mulford Hall MC #3114

[R] Type III sum of squares and appropriate contrasts

- suggesting that treatment contrasts do not usually result in meaningful results with Type III SS but it's not clear to me why. Any suggestions on a stats text discussing this would be greatly appreciated. Thanks, Mel -- Menelaos Stavrinides Ph.D. Candidate Environmental Science, Policy and Management