Example

> tansum = function (a,b,c)
  {
  local(totsum);
  totsum = a+b+c;
  return(tan(totsum));
  }
        <user-function>> fvscope(tansum);
        Function Variable SCOPE analysis for : tansum
        Filename: stdin

        line    GLOBAL                  ARG             LOCAL

           1                                            Local-Var: totsum
           1                            Arg-Var: a
           1                            Arg-Var: b
           1                            Arg-Var: c
           1    Global-Var: tan
           1                                            Local-Var: totsum
> fvscope(hilb);
        Function Variable SCOPE analysis for : hilb
        Filename: /usr/local/lib/rlab/rlib/hilb.r

        line    GLOBAL                  ARG             LOCAL

          15                                            Local-Var: i
          15                            Arg-Var: n
          16                                            Local-Var: j
          16                            Arg-Var: n
          17                                            Local-Var: h
          17                                            Local-Var: i
          17                                            Local-Var: j
          17                                            Local-Var: i
          17                                            Local-Var: j
          20                                            Local-Var: h
> // Note the use of global functions (=variables)
> fvscope(acosh);
        Function Variable SCOPE analysis for : acosh
        Filename: /usr/local/lib/rlab/rlib/acosh.r

        line    GLOBAL                  ARG             LOCAL

          13    Global-Var: log
          13                            Arg-Var: x
          13    Global-Var: sqrt
          13                            Arg-Var: x