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2005 Aug 26
1
Help in Compliling user -defined functions in Rpart
...+0.5*wt[i+1])/n}
r[1]<-0.5*wt[1]/n
wmean<-sum(y*wt)/sum(wt)
ci<-2*sum(wt*(y-wmean)*(r-0.5))/sum(wt*y)
devci<-abs(ci)*(1-abs(ci))
if(continous){
lss<-cumsum(wt*y)[-n]
rss<-sum(wt*y)-lss
lw<-cumsum(wt)[-n]
rw<-sum(wt)-lw
lm<-lss/lw
rm<-rss/rw
lcss<-cumsum(wt[1:length(lm)]*(y[1:length(lm)]-lm)*(r[1:length(lm)]-0.5))
rcss<-sum(wt*(y-wmean)*(r-0.5))-lcss
lci<-2*lcss/lss #concentration index for left side
rci<-2*rcss/rss #concentration index for right side
devlci<-abs(lci)*(1-abs(lci)) #deviance for left...