Re: [R] interpretation of stress in NMDS

2010-07-24 Thread Thomas Petzoldt
On 7/22/2010 2:21 PM, Graves, Gregory wrote: Among those users of Primer, stress values greater than 0.3 are interpreted as "questionable". Using both isoMDS and metaMDS (vegan package), the stress values returned are much higher using my own data and using examples provided in R Help. For exam

[R] interpretation of stress in NMDS

2010-07-22 Thread Graves, Gregory
Among those users of Primer, stress values greater than 0.3 are interpreted as "questionable". Using both isoMDS and metaMDS (vegan package), the stress values returned are much higher using my own data and using examples provided in R Help. For example Rstress = 8.3, and the stressplot r2 = 0.99