Re place only first NA in column

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of bikemike42
Sent: Tuesday, November 03, 2009 2:58 PM
To: r-help at r-project.org
Subject: [R] Re place only first NA in column


Dear All,

I am trying to fill in a blank vector ("a") with one value at a time, with
the value of the number of rows in a randomized dataset with rowSums=0.
Below is the code I've got so far, but what I want to be as the last line
is
" a[1st NA,]=nz"
such that this will run until all of my NAs are replaced with an integer
value based on randomizations.

a<-matrix(nrow=1000,ncol=1)
while(sum(is.na(a)>0))
	{
	z<-matrix(rbinom(832, 1, prob = 0.048), nrow = 32)
	rs<-rowSums(z)
	nz<-length(rs[rs==0])
	a[,]=nz

}

Thank you for your help!
Mike
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