[R] DataFrame help

[David Huffer]

The easiest way is to just do something like this:

> mdat <- matrix(c(4,2,3, 11,12,13), nrow = 2, ncol=3)
> mdat
     [,1] [,2] [,3]
[1,]    4    3   12
[2,]    2   11   13
> as.vector ( colSums ( mdat ) )
[1]  6 14 25
> 

HTH

--
 David

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of voidobscura
Sent: Thursday, July 16, 2009 2:26 PM
To: r-help at r-project.org
Subject: [R] DataFrame help


Alright, so I am trying to write my own function to calculate column
sums in
a matrix.  I want the result as a single list with the values.

So far I have:

csum<-function(m)
{
	a = data.frame(m)
	s = lapply(a,sum)
	return(s)
}

What is the easiest way to have it return in a format such as [1] 6 15
24 ?

Thanks.
-- 
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