[R] Find the empty element in a factor array

[Peter Alspach]

Tena koe Wendy

which(test=='')

Should do it.

HTH ....

Peter Alspach

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Wendy
> Sent: Thursday, 27 January 2011 10:59 a.m.
> To: r-help at r-project.org
> 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<-factor(c('A','','B','C','E'))
> > test
> [1] A   B C E
> Levels:  A B C E
> 
> I would like the result equal to 2.
> 
> Thank you,
> Wendy
> --
> 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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> and provide commented, minimal, self-contained, reproducible code.

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