Dear r-helpers, I just read in an article by Virtanen et al. (2006) where vegetation-environment relationships are studied by fitting smoothed surfaces on an NMDS ordination using GAMs (Wood 2000). The authors describe, that they used R² as goodness-of-fit statistic, which they compare to the R² of fitted vectors. Calculations were carried out using the package vegan (Oksanen). I know that I can fit vectors onto ordinations with the function envfit. The R² is listed in the output table. I also know that GAMs are implemented in vegan by the function ordisurf. But how can I get an R² from this function.
Thanks in advance, Kim -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! ______________________________________________ [email protected] 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.
