Hi Dieter, I'll take a shot at this. As I understand it, the stress is telling you how the ordination distances compare with original dissimilarities that you calculated.
It is a measure how well your ordination has done in representing the relationship of your sites. Note that the stress will differ depending on how many dimensions are used. I believe the default is k = 2 in isoMDS. Hope this helps, Michael > > Dear List, > > I'm trying to interpret the results of the Kruskal's > Non-metric Multidimensional Scaling algorithm (isoMDS, MASS > package). > > The 'goodness of fit' is reported as "The final stress > achieved (in percent)". > > What does this mean exactly? I've tried to google for an > answer but I've not come up with a definitive answer. > > Regards, > Dieter > > > -- > Dieter Vanderelst > PhD Student > > Active Perception Lab > University of Antwerp > http://batbits.webnode.com/ > > Postal Address: > Prinsstraat 13 > B-2000 Antwerp > Belgium Michael Denslow Graduate Student I.W. Carpenter Jr. Herbarium [BOON] Department of Biology Appalachian State University Boone, North Carolina U.S.A. -- AND -- Communications Manager Southeast Regional Network of Expertise and Collections sernec.org ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
