Thanks to both Robert McGehee and Andy Liaw for their informative
(and quick) replies.
Best Wishes,
spencer graves
McGehee, Robert wrote:
Not without extending character to another class. If you try to define
this "+" method using S4, you get a proper error indicating that
addition over characters is not allowed.
setMethod("+", signature("character", "character"),
function(e1,e2) paste(e1,e2, sep = ""))
Error in setMethod("+", signature("vector", "vector"), function(e1, e2)
paste(e1, :
The method for function "+" and signature e1="vector",
e2="vector" is sealed and cannot be re-defined
FYI, your S3 method wouldn't work anyway as the arguments for the +
operator are e1, e2 not x, y.
-----Original Message-----
From: Spencer Graves [mailto:[EMAIL PROTECTED]
Sent: Thursday, February 24, 2005 3:46 PM
To: Gabor Grothendieck
Cc: [email protected]
Subject: Re: [R] string concatenation operator
Can we do something to make the following work:
> "+.character" <- function(x,y) paste(x,y,sep="")
> "abc"+"def"
Error in "abc" + "def" : non-numeric argument to binary operator
Thanks,
spencer graves
Gabor Grothendieck wrote:
Harris A. Jaffee <hjaffee <at> jhmi.edu> writes:
: Why doesn't R have one, like "." in Perl or juxtaposition in awk?
You could define one like this:
R> "%+%" <- function(x,y) paste(x,y,sep="")
R> "abc" %+% "def"
[1] "abcdef"
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
