[R] how to count number of elements in a vector that are not NA ?

[David Huffer]

How about

countN <- function ( v ) {
  sum ( !is.na ( v ) ) - sum ( is.na ( v ) )
} 

--
 David
 
 -----------------------------------------------------
 David Huffer, Ph.D.               Senior Statistician
 CSOSA/Washington, DC           david.huffer at csosa.gov
 -----------------------------------------------------

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Godmar Back
Sent: Tuesday, July 07, 2009 2:57 PM
To: R-help at r-project.org
Subject: [R] how to count number of elements in a vector that are not NA ?

Hi,

is there a simpler way to count the number of elements in a vector
that are not NA than this:

countN <- function (v) {
    return (Reduce(function (x, y) x + y, ifelse(is.na(v), 0, 1)))
}

?

 - Godmar

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