Hello, I am an R noivce, so excuse my simple questions . My data have 5 respone variales (each 109 rows) and three independent variables, each with two levels [Age Class(A,SA), Repro State(L,NL) and Sex of Calf(F,M. *some females do not have calves so NA)]. My data are not normally distributed with unequal number of samples (within each independent variale). example: AClass RState CSex Chemo/min Aggress/min Nonagress/min A L F 0.5 0.5 0.3 SA L M 0.4 0.2 1 A NL F 0 1 0.1 A NL NA 2 0 0.3 SA NL F 0.4 0.4 0 I am trying to run ADONIS (as multivariate nonparametric anova) to test the differences and interactions. my code is the following: event<-read.csv("C:\\Users\\Owner\\Google Drive\\EventBehaviorResults\\Event.csv") adonisresults=adonis(Chemo.min~AClass+CSex+AClass*CSex,data=event,permutations=10,method="horn",strata=NULL,binary=FALSE) (and, separatelly for AClass and RState becaue I don't know how ot deal with NA values in ) adonisresults=adonis(Chemo.min~AClass+RState+AClass*RState,data=event,permutations=10,method="horn",strata=NULL,binary=FALSE) I get the following error message and am not able to proceed Error in rowSums(x, na.rm = TRUE) : 'x' must be an array of at least two dimensions I would appreciate any input as to how to continue (and am happy to elaborate if more info would be of help). Thank you for readign. Maggie [[alternative HTML version deleted]]