search for: bestfraction

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2011 May 24
1
seeking help on using LARS package
...> dim(trainData) [1] 18520 88 ytrain <- trainScore length(ytrain) [1] 18520 nfolds <- 100 epsilon <- exp(-10) # code from JP Vert object1 <- cv.lars(xtrain,ytrain, K=nfolds, fraction = seq(from = 0, to = 1 , length= 1000), type='lasso', eps=epsilon, plot.it=TRUE) bestfraction <- object1$fraction[min(which(object1$cv <= min(object1$cv)+ 0.01*(max(object1$cv)-min(object1$cv))))] bestcoef <- coef(object1,s=bestfraction,mode='fraction') # this gives bestcoef as NULL, I don't know why. # End code from Jp Vert # Code by me:: Not so sure about the authe...