> -----Original Message-----
> From: [hidden email] [mailto:r-help-bounces@r-
> project.org] On Behalf Of Wendy
> Sent: Thursday, 27 January 2011 10:59 a.m.
> To: [hidden email] > Subject: [R] Find the empty element in a factor array
> Hi all,
> I have a factor array, and some of the elements are empty. How would I
> return the index number of the empty elements. For example,
> > test
>  A B C E
> Levels: A B C E
> I would like the result equal to 2.
> Thank you,
> View this message in context: http://r.789695.n4.nabble.com/Find-the- > empty-element-in-a-factor-array-tp3238894p3238894.html
> Sent from the R help mailing list archive at Nabble.com.
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> https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting- > guide.html
> and provide commented, minimal, self-contained, reproducible code.
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