[R] Detect the presence of an object

[Spencer Graves]

      Have you considered "exists" or "missing"? 

      hope this helps.  spencer graves

Francisco J Molina wrote:

>Is there a  function like "is.there" such that 
>
>is.there ( a ) returns TRUE is object 'a' is in the current environment and
>FALSE otherwise?
>
>Thank you.
>Francisco J. Molina
>
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