R language list (list) and vector (numeric) conversion

list 转 numeric

list_num = list(1:5)
mode(list_num) # "list"
numeric_num_1 = unlist(list_num)

or

numeric_num_2 = as.numeric((unlist(list_num)))

or

numeric_num_3 = as.numeric(as.character(unlist(list_num)))

usemode()

mode(numeric_num_1) # "numeric"

numeric 转 list

numeric_num = c(1:5)
list_num = list(numeric_num)