[R] Is there an easier way than this to list all functions in the global environment?

[Byron Dom]

After an unsuccessful search thru several books plus online documentation, I was unable to find a simple way to do this, so I wrote my own function (see below) to do it.  I'm relatively new to R however, so I'm guessing that there must be an easier way to do it.

I want to list all functions and only the functions (not other objects also) in the global environment.

I'm working with several old R workspaces that contain a very large number of objects -- functions, data structures, etc. and I would to be able to easily find out which objects are functions.

The function below (listfunc()) works fine. I'm just asking this for future reference.

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listfunc <- function() { 
# lists names of all function objects in the global environment 
obj <- objects(.GlobalEnv) 
funclist <- character(length = 0) 
for (i in 1:length(obj)) { 
    if (mode(get(obj[i])) == "function") funclist <- c(funclist,obj[i]) 
  } 
return(funclist) 
}
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