Can you please explain What is principal() function? › Category: R Language › Can you please explain What is principal() function? 0 Vote Up Vote Down Editor">Editor Staff asked 2 years ago Can you please explain What is principal() function? 2 Answers 0 Vote Up Vote Down Editor">Editor Staff answered 2 years ago It is define in psych package which is used to rotate and extract the principal components. 0 Vote Up Vote Down Editor">Editor Staff answered 2 years ago It is define in psych package which is used to rotate and extract the principal components.