[R] Funny warning message

Ben Bolker ben at eno.princeton.edu
Tue Apr 6 16:32:32 CEST 1999

On Tue, 6 Apr 1999, John Logsdon wrote:

> Hi
> Sometimes (and I haven't yet found out what causes it) I get a message:
> Warning: ingnored non-function "t"
> I think it may be either when I have done a Ctl-C to break in or I may
> have inadvertently named a variable after one of the many system or other
> functions.  I have seen names other than "t".
> Anyway, the only way I can get rid of it is to exit and restart.  I don't
> think it causes any problems but has anyone else seen it and how to avoid?
> I am running 0.63.3 from the CRAN rpm on RH5.2
> John
   As you suggest, this happens when you've named a variable after a
system function ("t" and "c" are the most common culprits).  All you have
to do is remove the offending variable using rm(t) or rm(c); of course, if
you need that variable you probably want to copy it somewhere.
  R usually does the right thing under these circumstances, it's just
warning you.

  This should probably go in a FAQ list somewhere: I get this question
from students frequently.  Or perhaps (?) the warning message could be
usefully extended to 'ignored non-function "t"; type rm(t) to remove', or
even 'ignored non-function "t"; help("conflicts") for more information'
(where this basic information was provided in a help file).


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