[R] Converting a Vector into a 2-level Factor

[Henrique Dallazuanna]

Try this;

factor(vowels == "aa", labels = c("aa", "~aa"))

On Thu, Oct 22, 2009 at 4:36 AM,  <ntyson at clovermail.net> wrote:
> Hello Everyone,
>
> Let's say I have a vector as follows:
>
> vowels = c("aa", "aa", "ah", "ao", "eh)
>
> I want to make a factor consisting of two levels: the things that are "aa"
> and those that are not "aa".  How would I do that?
>
> I tried using factor(vowels, levels=c("aa", "~aa"), exclude=NULL), but this
> gives me '<NA>' or missing values, which is not what I want.  If there is no
> way to get two levels, then how do I convert the NAs to another symbol of my
> choosing?
>
> Any suggestions are welcome.
>
> Thanks.
>
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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O