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2009 Mar 10
1
Using napredict in prcomp
Hello all,
I wish to compute site scores using PCA (prcomp) on a matrix with
missing values, for example:
Drain Slope OrgL
a 4 1 NA
b 2.5 39 6
c 6 8 45
d 3 9 12
e 3 16 4
...
Where a,b... are sites.
The command
> pca<-prcomp(~ Drain + Slope + OrgL, data = t, center = TRUE, scale =
TRUE, na.action=na.exclude)
works great, and from
> pca$x
I can get site scores, e....