On 09.03.2016 12:34, ASANTOS wrote:
Thanks you very much Sven, But I try to make multiple comparisons and not with isolate factors and doesn't work. In my new code I have significant interaction, my example was: #1st factor treat <- gl(3, 20, labels = paste("t", 1:3, sep="")) #2nd factor imp <- rep(gl(2, 10, labels = c("yes", "no")), 3) #create a design matrix of the contrasts for "treat" in "imp" Treat_Imp<-model.matrix(~ imp:treat-1) #Variables sp1_1 = rnorm(10, 5, 0.25) sp1_2 = rnorm(50, 2.5, 0.25) sp1 = c(sp1_1,sp1_2) sp2 = rnorm(60, 2.5, 0.25) sp3_1 = rnorm(10, 12, 0.25) sp3_2 = rnorm(50, 2.5, 0.25) sp3 = c(sp3_1,sp3_2) sp4 = rnorm(60, 2.5, 0.25) sp<-cbind(sp1,sp2,sp3,sp4) require(vegan) fullModel <- adonis(sp ~ treat * imp, method = "euclidean") fullModel #Comparisons impyes:treatt1_impno:treatt1<- Treat_Imp[, 1] - Treat_Imp[, 2] impyes:treatt2_impno:treatt2<- Treat_Imp[, 2] - Treat_Imp[, 3] impyes:treatt3_impno:treatt3<- Treat_Imp[, 3] - Treat_Imp[, 4] adonis(sp ~ impyes:treatt1_impno:treatt1[as.logical(impyes:treatt1_impno:treatt1)] +impyes:treatt2_impno:treatt2[as.logical(impyes:treatt2_impno:treatt2)]+ +impyes:treatt3_impno:treatt3[as.logical(impyes:treatt3_impno:treatt3)],method = "euclidean") #
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