where does knn.reg stand in r? what is knn.reg knn reg function how to use knn.reg in r knn.reg how to use in r how to use knn.reg what is knn_reg what is the function of knn.reg can you use knn.reg to predict a missing value in r what is knn.reg what is knn.reg what is knn.reg in r how to use the function na in r knn.reg function what is knn.reg in r what is the difference between knn.reg and rpt.reg? knn.reg function for incomplete data where is knn.reg used knn reg example why does knn.reg return nas