[R] transfer string to expression

Wu Gong wg2f at mtmail.mtsu.edu
Sun Oct 31 21:47:28 CET 2010


Hi Duncan:

I'm curious about the environment setting. ?eval says: 

"If envir is not specified, then the default is parent.frame() (the
environment where the call to eval was made). "

So what's the difference between set envir=parent.frame() or not?

Thank you.

Wu

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