-----Original Message-----
From: Warnes, Gregory R
Sent: Friday, May 23, 2003 5:22 PM
To: 'Thomas Lumley'; Warnes, Gregory R
Cc: r-devel@stat.math.ethz.ch
Subject: RE: [Rd] grep, gsub, sub have problems with NA
values (PR#3078)
FormatC also has the reverse problem, it detects any factor
contianing the string "NA" and converts it to a factor:
formatC(factor("NAME"),width=8)
[1] <NA>
Levels: NAME
-Greg
-----Original Message-----
From: Thomas Lumley [mailto:tlumley@u.washington.edu]
Sent: Friday, May 23, 2003 11:47 AM
To: gregory_r_warnes@groton.pfizer.com
Cc: r-devel@stat.math.ethz.ch
Subject: Re: [Rd] grep, gsub, sub have problems with NA
values (PR#3078)
On Thu, 22 May 2003 gregory_r_warnes@groton.pfizer.com wrote:
In a string context, grep, gsub, sub are improperly
the string "NA", and returning unexpected results
as were chartr, abbreviate, substr, substring, strsplit.
Fixed in r-devel,
for the case of NA in the `main' string. Haven't yet decided
what to do
about
grep(as.character(NA), x)
or
substr(x,1,2)<-as.charcter(NA)
-thomas