[R] library vegan - cca - versus CANOCO

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 wh

[R] Performing a glm binomial model

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.

Re: [R] princomp - varimax - factanal

Thank you very much Bill!!! We get it. The results are the same. Best wishes, Alberto 2009/1/30 William Revelle > At 3:00 PM +0100 1/30/09, Alberto Maceda Veiga wrote: > >> Hi! >> >> I am trying to analyse with R a database that I have previously analysed >&g

[R] princomp - varimax - factanal

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