[ESS] S+ re-factoring ( some recent bugs/annoyances)

[Vitalie Spinu]

  >> gerald.jean at dgag.ca
  >> on Thu, 13 Dec 2012 08:18:17 -0500 wrote:

  > Hello Vitalie,

  > the following functions are unknown to S+:

  > tryCatch, environmentName, environment

So are there packages, directories? Functions are store somewhere. 

I just need a function that takes an OBJECT and if that OBJECT is a
function, print a string of the form '(list "funPackage" '(("a" . "4")
("b" . "5")) )' where funPackage is the location of the function. The
second sub-list is an elisp alist with keys -- the function arguments,
and the values -- the default values. If that OBJECT is not a function
return NULL.

It should not be difficult,  just to replace tryCatch, environmentName
and environment with the counterparts in S+ in the code I provided. Here
it is again:

  funnargs <- 
    function(object){
      funname <- as.character(substitute(object))
      fun <- tryCatch(object, error=function(e) NULL) ## works for special objects also
      if(is.function(fun)) {
        args <- args(fun)
        fmls <- formals(args)
        fmls_names <- names(fmls)
        fmls <- gsub('\"', '\\\"', as.character(fmls), fixed=TRUE)
        args_alist <- sprintf("'(%s)", paste("(\"", fmls_names, "\" . \"", fmls, "\")", sep = '', collapse = ' '))
        envname <- environmentName(environment(fun))
        cat(sprintf('(list \"%s\" %s )\n', envname, args_alist))
      }
    }

Can you please investigate?

  > I am going to try to install the SVN version of S+ but I have no
  > administrative rights on the machie where I am running Splus, will it work
  > anyway???

Yes it will work in any directory you have write permissions. It is
"make" not "make install" that you have to run. You don't need
administrative rights for that.

    Vitalie

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  > Vitalie Spinu <spinuvit at gmail.com> a écrit sur 2012/12/12 11:22:45 :

  >> >> gerald.jean at dgag.ca
  >> >> on Wed, 12 Dec 2012 10:28:58 -0500 wrote:
  >> 
  >> [...]
  >> 
  >> 
  gj> I am willing to test this release from SVN but have never installed
  gj> anything from SVN, where do I find how to do it???
  >> 
  >> It's very easy. The somewhat obfuscated instructions are
  >> http://ess.r-project.org/Manual/ess.html#Installation>
  >> Just do
  >> 
  >> svn checkout https://svn.r-project.org/ESS/trunk ESS
  >> 
  >> this creates ESS directory with the source inside. Switch to it and do
  >> 
  >> make
  >> 
  >> This step is not strictly necessary but it makes things faster.
  >> 
  >> Now add to your init file:
  >> 
  >> (load "~/path/to/ESS/lisp/ess-site")
  >> 
  >> That's all.
  >> 
  >> [...]
  >> 
  >> 
  >> >> > args("plot")
  >> >> function (x, y, ...)
  >> >> NULL
  >> >> >
  >> 
  >> Good, now check if this function works:
  >> 
  >> funnargs <-
  >> function(object){
  >> funname <- as.character(substitute(object))
  >> fun <- tryCatch(object, error=function(e) NULL) ## works for
  >> special objects also
  >> if(is.function(fun)) {
  >> args <- args(fun)
  >> fmls <- formals(args)
  >> fmls_names <- names(fmls)
  >> fmls <- gsub('\"', '\\\"', as.character(fmls), fixed=TRUE)
  >> args_alist <- sprintf("'(%s)", paste("(\"", fmls_names, "\"
  >> . \"", fmls, "\")", sep = '', collapse = ' '))
  >> envname <- environmentName(environment(fun))
  >> cat(sprintf('(list \"%s\" %s )\n', envname, args_alist))
  >> }
  >> }
  >> 
  >> it should do something of this kind:
  >> 
  >> 
  >> > funnargs(plot)
  >> (list "graphics" '(("x" . "") ("y" . "") ("..." . "")) )
  >> > funnargs(ls)
  >> (list "base" '(("name" . "") ("pos" . "-1") ("envir" . "as.
  >> environment(pos)") ("all.names" . "FALSE") ("pattern" . "")) )
  >> 
  >> If it works, then we are done. You will have your eldoc in the evening.
  >> 
  >> Let me know what it returns for local functions:
  >> 
  >> > tt <- list(fun =  function(a = 4, b = 5) a*b)
  >> > funnargs(tt$fun)
  >> (list "R_GlobalEnv" '(("a" . "4") ("b" . "5")) )
  >> 
  >> 
  >> Vitalie