Re: [R] availability of a "solve" function in R?

From: Achim Zeileis (zeileis@ci.tuwien.ac.at)
Date: Sat 22 Sep 2001 - 22:40:21 EST

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Message-id: <3BAC86B5.104FA6AE@ci.tuwien.ac.at>

Ron Shonkwiler wrote:
>
> I would like to define a function of two variables f(x,y) and, for
> a given value of x, solve f(x,y)=0 for y.
>
> Is this available in R?

Have a look at uniroot(), e.g. do something like

R> myfun <- function(x,y) x+y
R> uniroot(function(x) myfun(x,5), c(-10,10))

cheers
Z
 
> ron shenk
> shenk@math.gatech.edu
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