Hi, I did a linear regression with 5 explanatory variables. Now, to see the contribution of each variable, I use varpart from vegan library. But varpart don?t accepts my 5 explanatory variables, it accept only 4. 1- How must I do to use my 5 explanatory variables? 2- Is it the sum of variance fraction of each variable must be equal to 1. Thanks for your help. Komine -- View this message in context: http://r.789695.n4.nabble.com/Problem-with-varpart-vegan-library-tp3650816p3650816.html Sent from the R help mailing list archive at Nabble.com.