Adabag package in R

adaboost, r

Solution

I get exactly that error message when running a minor modification of `boosting`'s first example:

> data(iris)
> iris.adaboost <- boosting(factor(Species)~., data=iris, boos=TRUE, mfinal=10)
Error in `[.data.frame`(data, , as.character(formula[[2]])) : 
  undefined columns selected

So you should try the advice I just gave in a comment (to do the factor()-ing beforehand). The formula interface to `boosting` is not full featured enough to even handle the `factor` function in its parse-tree.

Problem

I am trying to perform classification using R's adabag package. The following call works perfectly with R's ada package's ada() function. ``` model<-ada(factor(label)~., data=trainingdata) ``` But when the same training data set is used in the following adabag's function call, it returns an error: ``` model<-boosting(factor(label)~., data=trainingdata) Error in `[.data.frame`(data, , as.character(formula[[2]])) : undefined columns selected ``` What this error suggests exactly?

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