[R] some functions

R shows all the variables:

　　ls()

R remove some variable:

　　rm("variable_name") or rm(variable_name)

R remove all the variables:

　　rm(list=ls())

R get the value of some variable by name :

　　get(names)

R paste: collapse and sep parameter

collapse is use for different elements, sep is used for different parts

原文：https://www.cnblogs.com/vinking/p/12052473.html