Displaying 1 result from an estimated 1 matches for "nmdswasc".
2011 Nov 24
4
I cannot get species scores to plot with site scores in MDS when I use a distance matrix as input. Problems with NA's?
...factor traits were coded into dummy variables and all integer variables (including binary) were coerced to numeric variables. Here are the codes used and the error messages I have got:
?> NMDSgowdis<- metaMDS(SpeciesGowdis)
> NMDSpoints<-postMDS(NMDSgowdis$points,SpeciesGowdis)
> NMDSwasc<-wascores(NMDSpoints,TraitsNMDSdummies)
Error in if (any(w < 0) || sum(w) == 0) stop("weights must be non-negative and not all zero") : missing value where TRUE/FALSE needed?
I imagine the problem is with the NA?s in the data.
Alternatively, I have used the ?add.spec.scores? fun...