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Which of the following function tracks the changes in model statistics?

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Which of the following function tracks the changes in model statistics?

(a) varImp

(b) varImpTrack

(c) findTrack

(d) none of the mentioned

This question was posed to me in a national level competition.

This is a very interesting question from caret topic in portion Machine Learning of Data Science

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The correct answer is (a) varImp

For explanation: GCV change value can also be tracked.

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