Message-ID: <F8A97883-BCA6-441F-84BB-2B16610F4D62@comcast.net>
Date: 2009-02-21T02:27:44Z
From: David Winsemius
Subject: how to add names to an object created using assign
In-Reply-To: <A5C9C326-7183-499C-B630-E64AC86910CE@gmail.com>
At this point, the function would only return the names because unless
specified otherwise they return the result of the last evaluation. Add
another line with just "a" and assign the results of the function to
something:
> testold=function(){
+ assign("a",c(1,2,3),env=.GlobalEnv)
+ names(a)=c("one","two","three")
+ }
> a3 <- testold()
> a3
[1] "one" "two" "three"
test=function(){
assign("a",c(1,2,3),env=.GlobalEnv) # I rather doubt the env
assignment is needed
names(a)=c("one","two","three");
a
}
a2 <- test()
-----
> a2
one two three
1 2 3
QED;
David Winsemius
On Feb 20, 2009, at 6:32 PM, Fuchs Ira wrote:
> If I assign a variable in a function, as in:
>
> test=function(){
> assign("a",c(1,2,3),env=.GlobalEnv)
> }
>
> How can I do the equivalent of:
>
> names(a)=c("one","two","three")
>
> within the function?
>
> Merely adding the call to names does not work within the function as
> it only affects a local variable:
>
> test=function(){
> assign("a",c(1,2,3),env=.GlobalEnv)
> names(a)=c("one","two","three")
> }
>
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