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2008 Oct 20
1
Calculate SPE in PLS package
Dear list,
I want to calculate SPE (squared prediction error) in x-space, can
someone help?
Here are my codes:
fit.pls<-
plsr(Y~X,data=DAT,ncomp=3,scale=T,method='oscorespls',validation="CV",x=
T)
actual<-fit.pls$model$X
pred<-fit.pls$scores %*% t(fit.pls$loadings)
SPE.x<-rowSums((actual-pred)^2)
Am I missing something here?
Thanks in advance.
Stella Sim