remove all variables except functions

Question

I have loaded in a R console different type of objects  I can remove them all using  rm list ls      or remove only the functions  but not the variables  using  rm list lsf str      My question is  is there a way to remove all variables except the functions

User · Accepted Answer

Here s a one-liner that removes all objects except for functions   rm list   setdiff ls    lsf str       It uses setdiff to find the subset of objects in the global environment  as returned by ls    that don t have mode function  as returned by lsf str

User · Answer

The posted setdiff answer is nice   I just thought I d post this related function I wrote a while back   Its usefulness is up to the reader  -    lstype lt -function type  closure         inlist lt -ls  GlobalEnv      if  type   function   type  lt - closure      typelist lt -sapply sapply inlist get  typeof      return names typelist typelist  type

User · Answer

I wrote this to remove all objects apart from functions from the current environment  Programming language used is R with IDE R-Studio        remove list c                                 create a vector        for i in 1 NROW ls                          repeat over all objects in environment         if class get ls   i      function         if object is  not  a function          remove list c remove list ls   i           add to vector remove list                             rm list remove list                           remove all objects named in remove list   Notes-  The argument  list  in rm list   must be a character vector    The name of an object in position i of the current environment is returned from ls   i  and the object itself from get ls   i    Therefore the class of an object is returned from class get ls   i

User · Answer

You can use the following command to clear out ALL variables  Be careful because it you cannot get your variables back   rm list ls all TRUE

User · Answer

Here s a pretty convenient function I picked up somewhere and adjusted a little   Might be nice to keep in the directory   list objects  lt - function env    GlobalEnv         if  is environment env            env  lt - deparse substitute env           stop sprintf    s  must be an environment   env             obj type  lt - function x  class get x  envir   env       foo  lt - sapply ls envir   env   obj type      object name  lt - names foo      names foo   lt - seq length foo       dd  lt - data frame CLASS   foo  OBJECT   object name                        stringsAsFactors   FALSE      dd order dd CLASS        gt  x  lt - 1 5  gt  d  lt - data frame x   gt  list objects            CLASS       OBJECT   1 data frame            d   2   function list objects   3    integer            x   gt  list objects env   x    Error in list objects env   x     x  must be an environment

[r] remove all variables except functions

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