[R] Passing formula as an agrument

Joshua Wiley jwiley.psych at gmail.com
Sun Jan 23 21:44:04 CET 2011

Hi Tim,

I already answered this exact question from a different poster (by the
name of Paul Evans, subject: "Passing in arguments into function"),
that occurred within marvelous temporal proximity to your own, so I
will just refer you to that (search the archives with name + subject).

Just as a note, diff() is a function, so it is probably best to give
the variable you store the results of a call to lm() in a different
name, even if it is trivially different:

diff1 <- lm(x ~ y + z)

It can help to prevent future confusion and headache.



On Sun, Jan 23, 2011 at 8:44 AM, Tim Smith <tim_smith_666 at yahoo.com> wrote:
> Hi,
> I had a function that looked like:
> diff <- lm(x ~ y + z)
> How can I pass the argument to the 'lm' function on the fly? E.g., if I pass it
> in as a string (e.g. "x ~ y + z"), then the lm function treats it as a string
> and not a proper argument.
> many thanks
>        [[alternative HTML version deleted]]
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Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles

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