Message-ID: <61D3C9CA-2D8E-4DE1-AE54-2486A346E6B6@auckland.ac.nz>
Date: 2010-01-27T19:06:25Z
From: Rolf Turner
Subject: Executing a R-string
In-Reply-To: <F2C90BED-A61B-49B5-B284-044118E0782A@mac.com>
On 28/01/2010, at 2:59 AM, Joe Trubisz wrote:
> Hello...
>
> In other languages (e.g. php, perl), you have the ability to create a
> valid string and execute the string to get the result. For example (in
> pseudo-R):
>
> S<-"which(m==4)"
> R<-exec(S)
>
> I know this does not work, but was wondering if there was an
> equivalent mechanism that I cannot find in the docs anywhere to make
> it work.
> set.seed(42)
> m <- sample(0:9,42,TRUE)
> S <- "which(m==4)"
> eval(parse(text=S))
[1] 11 15 19 29 42
cheers,
Rolf Turner
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