Okey, really many thanks... So having low Stress value is foundamental, as it is as lower as higher the model fit the data, is that right? How can I know if my Stress is correct? I mean, if it is enough low to asses that the model fit good the samples data shifts into the graph... Is there a treshold or something? I would appreciate any pdf or kind of reviews on ordination models for community ecology data... :) Thank you really much! Cheers, Gian 2009/12/1 Gian Maria Niccolò Benucci > Hi Hi there, > > I am trying to use funcion metaMDS (vegan pakage) for Community Ecology > data, but I find no way to calculate the "expressed variance" of the first 2 > axis? is there a way to do that? > Thanks a lot in advance, > > Gian > > > -- Dr. Gian Maria Niccolò Benucci Department of Applied Biology - University of Perugia Borgo XX Giugno, 74 06121 Perugia, Italy Email: gian.benucci@gmail.com Tel: +39.075.5856433 [[alternative HTML version deleted]]