[R] function to check if an object is present, and if not, load it from my hard drive

From: r user <ruser2006_at_yahoo.com>
Date: Sat 06 May 2006 - 01:29:04 EST

I want to check if an "object" (dataset, vector, etc) is “present”. If it is present, I will do nothing. If it is not present, I will load it from my hard drive.

Is there function to determine if an object is present?

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