More on apply family of functions - avoid loops to get more speed.
Donаld L. J. Quicke, Buntika Areekul Butcher, Rachel Kruft Welton · CABI eBooks · 2021
Abstract This chapter focuses on the 'apply' set of functions. These functions are for those who need to process very large datasets, or who need to perform loop-type operations on largish datasets but perhaps in a nested fashion.