Re: small question about NA

["Stewart, William" <william.stewart@rbc.com>]

The easiest way I can think of is to use subscripting to exclude NA objects (implicitly treating them as zero in the sum). For example:

test <- c(1,2,3,4,NA,6,7,8,9)

sum(test[!is.na(test)])

-------------------------
William A. Stewart
Manager, Operational Risk
RBC Financial Group
william.stewart@rbc.com
phone: 416-974-3019

-----Original Message-----
From: s-news-owner@lists.biostat.wustl.edu [mailto:s-news-owner@lists.biostat.wustl.edu]On Behalf Of stephane.g.zebouni@jpmorgan.com
Sent: Friday, August 19, 2005 10:04 AM
To: s-news@lists.biostat.wustl.edu
Subject: [S] small question about NA

Hi,

I am using S-plus 6.1. I am making sums of vectors where no value (NA) can occur and I want to consider those values as 0 - is there an easy way to do that?

thanks a lot in advance

Stephane Zebouni

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