[R] Replacing NA values in one column of a data.frame

[Uwe Ligges]

John Kane wrote:
> Perhaps
> testdata$onecolumn[testdata$onecolumn==NA] <- 9999
> 

Well, with is.na() there is a much better chance to make it work

Uwe Ligges




> --- On Mon, 8/17/09, Steve Murray <smurray444 at hotmail.com> wrote:
> 
>> From: Steve Murray <smurray444 at hotmail.com>
>> Subject: [R] Replacing NA values in one column of a data.frame
>> To: r-help at r-project.org
>> Received: Monday, August 17, 2009, 11:41 AM
>>
>> Dear all,
>>
>> I'm trying to replace NA values with -9999 in one column of
>> a data frame. I've tried using is.na and the
>> testdata[testdata$onecolumn==NA] <- 9999 approach, but
>> whilst neither generate errors, neither result in -9999s
>> appearing - the NAs remain there!
>>
>> I'd be grateful for any advice on what I'm doing wrong or
>> any other suitable approaches.
>>
>> Many thanks,
>>
>> Steve
>>
>> _________________________________________________________________
>>
>> oticons.
>>
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> 
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