[R-sig-eco] stress measure in NMDS - vegan

[Jari Oksanen]

On 01/03/2012, at 17:51 PM, Gian Maria Niccolò Benucci wrote:

> Hi all,
> 
> I am wondering if stress in isoMDS() of MASS package is calculated it in
> percentage value (0-100) while in monoMDS() of vegan in proportional values
> (0-1).
> Do someone have any idea about that?
> 

Certainly someone has an idea, and even has documented this: look ?metaMDS and vegandocs("FAQ") which both explain this in vegan.

Wouldn't that be self-evident? Stress is a proportional measure, and if a "proportion" is >1, it must a percentage.

Cheers, Jari Oksanen
-- 
Jari Oksanen, Dept Biology, Univ Oulu, 90014 Finland
jari.oksanen at oulu.fi, Ph. +358 400 408593, http://cc.oulu.fi/~jarioksa