write R code without using libraries

Project$$s description

This project is about analyzing a function definition. More precisely, it is about taking a function$$s definition and returning a data frame with two columns. The first one contains all symbols used in the function$$s definition, and the second one has either the environment$$s name containing the definition of the symbol or a description of the symbol$$s type, e$.$g$.,$ locally defined, given as argument, etc.

Technically, you must define a function listSymbols$(),$ taking a single argument f and returning a data frame. It is assumed that the function f is a closure $($not a builtin, as those are compiled functions and we cannot see their code from the level of pure R language$).$ The following examples present the particular functionalities of the required function.

listSymbols$($f $=$ plot.default$)$

symbol definition

$1!$ base

$2...$ arg

$3[$ base

$4\{$ base

$5<-$ base

$6$ $ base

$7$ ann arg

$8$ asp arg

$9$ axes arg

$10$ Axis graphics

$11$ box graphics

$12$ deparse$1$ base

$13$ dev.flush imports:graphics

$14$ dev.hold imports:graphics

$15$ frame.plot arg

$16$ function base

$17$ if base

$18$ invisible base

$19$ is$.$finite base

$20$ is$.$null base

$21$ localAxis locally defined

$22$ localBox locally defined

$23$ localTitle locally defined

$24$ localWindow locally defined

$25$ log base

$26$ main arg

$27$ missing base

$28$ on$.$exit base

$29$ panel.first arg

$30$ panel.last arg

$31$ plot.new graphics

$32$ plot.window graphics

$33$ plot.xy graphics

$34$ range base

$35$ sub base

$36$ substitute base

$37$ title graphics

$38$ type arg

$39$ x arg

$40$ xgap.axis arg