Other method:
a<-matrix(seq(1,20,2), 4,5)
a[c(1:2),c(2:4)]<-0
a[a==0]<-NA
----- Original Message -----
From: "Robert Kinley" <kinley_rob...@lilly.com>
To: <r-help@r-project.org>
Sent: Friday, June 12, 2009 11:59 AM
Subject: [R] replacing zeros by NAs
something like ...
x<-c(1,2,3,0,5,6,0)
is.na(x[x==0])<-T
x
[1] 1 2 3 NA 5 6 NA
~~~~~~~~~~~~~~~~
Robert Kinley
~~~~~~~~~~~~~~~~
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