if you remove columns from a data.frame (e.g., by overwriting it with an empty 
data.frame) which is opened in RKWard's data editor at the same time, you are 
asked if you would like to recover that data. try this:

  myTest <- data.frame(a="test", b="test")
  # after this, open myTest in the data editor

  # keep it open and overwrite the object
  myTest <- data.frame()
  # you'll be asked to recover both variables "a" and "b"

while this is generally a nice feature, it can be quite nerve-wrecking in 
cases where you want to recreate large objects from scratch and happened to 
forget to close the editor tab... i haven't found a way to deactivate this, 
and there doesn't seem to be an option to check something like "don't ask 
again". i then usually spend a few minutes clicking "no" a hundred times.

i don't know how RKWard handles this, but i think it would be best if you were 
not asked one variable at a time, but once for the whole object, presenting 
some kind of list of variables which were removed and could be checked to have 
them recovered. but at least a "don't bother me gain" checkbox or a "say 'yes' 
to all changes to this object" button would be nice ;-)

viele grüße :: m.eik

  dipl. psych. meik michalke
  abt. f"ur diagnostik und differentielle psychologie
  institut f"ur experimentelle psychologie
  heinrich-heine-universit"at d"usseldorf

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