R help - Jan 2006 - Warning message when returning multiple items

In my function I am trying to return multiple computed items (separated by
commas).  The function does what I need, but I get a warning message that
multi-argument returns are deprecated.  Is this a warning I should heed, or is
there a more elegant and warning free way of achieving the same end?  Thanks


		
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Return a list:

   f <- function(x) list(x = x, x.squared = x*x)


On 1/30/06, Krish Krishnan <rkrishnan8216 at yahoo.com>
wrote:
>  In my function I am trying to return multiple computed items (separated by
commas).  The function does what I need, but I get a warning message that
multi-argument returns are deprecated.  Is this a warning I should heed, or is
there a more elegant and warning free way of achieving the same end?  Thanks
>
>
>
> ---------------------------------
>
>
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>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
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> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>

On Mon, 2006-01-30 at 10:35 -0800, Krish Krishnan wrote:
>  In my function I am trying to return multiple computed items
> (separated by commas).  The function does what I need, but I get a
> warning message that multi-argument returns are deprecated.  Is this a
> warning I should heed, or is there a more elegant and warning free way
> of achieving the same end?  Thanks
foo <- function(x)
  {
     x5 <- x * 5
     rootx <- sqrt(x)
     squaredx <- x^2
     return(list(x5 = x5, rootx = rootx, squaredx = squaredx))
  }
> foo(9)
$x5
[1] 45

$rootx
[1] 3

$squaredx
[1] 81

HTH

G

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For the last few versions of R (don't remember when the change happened
now), you need to explicitly wrap the objects in a list, instead of simply
having them in return().  I.e., instead of return(a=thing1, b=thing2), you
simply use list(a=thing1, b=thing2) as the last line of the function.

Andy

From: Krish Krishnan
> 
>  In my function I am trying to return multiple computed items 
> (separated by commas).  The function does what I need, but I 
> get a warning message that multi-argument returns are 
> deprecated.  Is this a warning I should heed, or is there a 
> more elegant and warning free way of achieving the same end?  Thanks
> 
> 
> 		
> ---------------------------------
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html
> 
>

Thanks everyone.  Returning the items in a list worked like a charm.


			
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