I have a bunch of tables in a Microsoft Access database. An updated database is sent to me every week containing a new table. I know that is inefficient and weird but welcome to my life. I want to read the tables whose names are something such as "040207" but not the ones that have alphanumeric names such as "everyone". Using RODBC I am easily able to create a character vector of the names of the tables. Is there a function that can differentiate values consisting only of digits (numerics) as opposed to ones that contain letters (and perhaps digts as well)? I am sure there is. What is it and where should I have found it?
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