search for: pretreatmentf

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2010 Dec 02
5
Tukey Test, lme, error: less than two groups
...anything helpful in the help or in the forum. I am analysing a dataset of treated grasses. I want to find out, if the grasses from different Provenances react differently. In the aov test I found a significance for the combination Treatment and provenance: summary(PAMaov<-aov(PAMval~Treatmentf*Pretreatmentf*Provenancef+Error(Datef/Code))) Treatmentf:Provenancef p-value: 0.008023 ** In the Linear fixed effects model lme, I can see that there is a significance for two provenances (HU and ES) summary(PAM.lme<-lme(PAMval~Treatmentf*Provenancef*Pretreatmentf, random= ~1|Datef/Code,na....