Try this: foo <- function(expr, x){ eval(substitute(expr)) }
foo(x^2, 4) foo(x^3-10, 2) On Fri, Sep 25, 2009 at 6:16 PM, njhuang86 <njhuan...@yahoo.com> wrote: > > Hi. I was wondering how I can write a function that generates the outcome > values for a user specified equation. For example, function(x^2, 4) will > return back 16 and function(x^3 - 10, 2) will give back -2... > > I've been playing around with various lines of code but somehow, I just > cannot get R to recognize the equation that I pass to it is just a random > variable and doesn't need to be initialized... > -- > View this message in context: > http://www.nabble.com/Function-question-tp25619434p25619434.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.