[R] Recoding numeric value
Marc Schwartz
marc_schwartz at me.com
Fri May 18 22:23:52 CEST 2012
On May 18, 2012, at 2:26 PM, Giggles wrote:
> I am a newbie and can't figure out how to recode a numeric value. In
> my data (pharm311), I have a column called "explain" and I need to
> find all the 6's and change it to NA (blank). Could someone help?
>
> I'm sorry if this is too basic, I started messing with R this week and
> got stuck with this problem since yesterday...
>
> Thanks in advance!
The easiest and canonical way would be:
is.na(pharma311$explain) <- pharma311$explain == 6
See ?is.na for more information.
Just to be picky, an NA value is not the same as blank. That is NA != "". R has specific behavior in dealing with NA values.
Regards,
Marc Schwartz
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