[R] p-value for Nonmetric Multidimentional Scaling?

2008-07-04 Thread Michael Denslow
Dear R-helpers, I am running metaMDS in the vegan package, which uses isoMDS in MASS, to perform Nonmetric Multidimentional Scaling (NMDS). I have seen some authors report a p-value for the NMDS ordination based on randomization of the dataset. As I understand it this is meant to compare the s

Re: [R] p-value for Nonmetric Multidimentional Scaling?

2008-07-04 Thread Bill.Venables
July 2008 2:14 PM To: r-help@r-project.org Subject: [R] p-value for Nonmetric Multidimentional Scaling? Dear R-helpers, I am running metaMDS in the vegan package, which uses isoMDS in MASS, to perform Nonmetric Multidimentional Scaling (NMDS). I have seen some authors report a p-value for the NMDS

Re: [R] p-value for Nonmetric Multidimentional Scaling?

2008-07-05 Thread Gavin Simpson
On Fri, 2008-07-04 at 21:14 -0700, Michael Denslow wrote: > Dear R-helpers, > > I am running metaMDS in the vegan package, which uses isoMDS in MASS, > to perform Nonmetric Multidimentional Scaling (NMDS). > > I have seen some authors report a p-value for the NMDS ordination > based on randomizat