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Hi! I am trying to analyse with R a database that I have previously analysed with SPSS. Steps with SPSS: Factorial analysis Extraction options : I select = Principal component analysis Rotation: varimax Steps with R: I have tried it with varimax function with factanal or with princomp...and the results are different of what I have with SPSS. I think that varimax function is incorporated in

Hello R-users, My first consult is that I would like to tackle the relationship between a dependent variable and four environmental factors using a glm binomial model. The problem is that I want to test the interaction between factors too and I would like to learn some way to do it automatically. Now, my syntax is, for instance: E1<-glm(formula = (ENF/TOT)~VAR1+VAR2+VAR3+VAR4, family =

Hi R users, I have two data matrix, one with community data and another with environmental data. Prior to preform the CCA, I have used PCA to select some environmental variables and to avoid redundance information. The result is that I have 4 environmental variables and my community data matrix where, following bibliography, I have eliminated rare species. All variables were log-transformed (x+1)