I am new to R, so maybe I'm missing the point of your question. But why
wouldn't you just use sum(a,b)?
Murray M Cooper, Ph.D.
Richland Statistics
9800 N 24th St
Richland, MI, USA 49083
Mail: richs...@earthlink.net
----- Original Message -----
From: "Fuchs Ira" <irafu...@gmail.com>
To: <r-help@r-project.org>
Sent: Thursday, February 05, 2009 5:10 PM
Subject: [R] eval and as.name
I'm sure there is a more general way to ask this question but how do you
use the elements of a character vector as names of objects in an
expression?
For example, say you have:
a = c(1,3,5,7)
b = c(2,4,6,8)
n=c("a","b")
and you want to use the names a and b in a function (e.g. sum)
sum(eval(as.name(n[1])),eval(as.name(n[2])))
works but
what is a simpler way to effect this level of indirection?
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and provide commented, minimal, self-contained, reproducible code.
