R: Primitive Function - For Historical or Efficiency Reasons?

问题

How would I find list of primitive functions in R meant for historical or efficiency reasons?

Primitive functions are the ones that provide links between R code and the C code used to write R.

回答1:

This will get you the names of all R functions that wrap calls to .Primitive():

nms <- names(methods:::.BasicFunsList)        ## ?.BasicFunsList for more info

length(nms)
# [1] 192
c(head(nms, 8), tail(nms, 8))
#  [1] "$"          "$<-"        "["          "[<-"       
#  [5] "[["         "[[<-"       "%*%"        "xtfrm"     
#  [9] "switch"     "tracemem"   "unclass"    "untracemem"
# [13] "while"      "{"          "||"         "~"      

回答2:

This is the the manual by Cran, which has a lot of information regarding historical and efficiency. It has a brief introduction of R commands and which one is better to use in which scenario.

来源：https://stackoverflow.com/questions/12632246/r-primitive-function-for-historical-or-efficiency-reasons