[R] function call

Peter Dalgaard p.dalgaard at biostat.ku.dk
Mon Jun 19 12:04:58 CEST 2006

vincent at 7d4.com writes:

> Dear R-users,
> When a function f1() is called, is there a way to know,
> from inside the function f1(), if f1() is directly called from the
> R console, or indirectly from another function f2() ?
> Of course, I may add an argument to f1(..., callbyf2=FALSE) only used
> by f2() giving explicitely this info, but I would like to know
> if there may be a more generic way ?
> Thanks for any info or pointer

You can always query via sys.status/sys.call/sys.function etc. Or, if
the issue is whether the call is from the command line: 

  identical(parent.frame(), globalenv())

However, it does look a bit like unsound programming practice. Why do
you perceive a need to do this?

   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907

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