[Rd] turning expression object to function

From: Antonio, Fabio Di Narzo <antonio.fabio_at_gmail.com>
Date: Mon 18 Dec 2006 - 18:06:46 GMT


Dear all,
I have the following problem.

Given an expression object 'expr' containing a certain set of symbols (say 'a', 'b', 'c'), I would like to translate the expression object in an R function of, say, 'a', programmatically. Here an example of what I mean.

Given:
> expr <- expression(a+b+c)

a call like:
> asFunctionOf(expr, 'a', list(b=1, c=2))

should return a function (not necessarly formally) equivalent to
> function(a) a+1+2

Some suggestions?

Best regards,
Antonio.



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