Tena koe Wendy which(test=='')
Should do it. HTH .... Peter Alspach > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Wendy > Sent: Thursday, 27 January 2011 10:59 a.m. > To: r-help@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. > > ______________________________________________ > R-help@r-project.org mailing list > 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. The contents of this e-mail are confidential and may be subject to legal privilege. If you are not the intended recipient you must not use, disseminate, distribute or reproduce all or any part of this e-mail or attachments. If you have received this e-mail in error, please notify the sender and delete all material pertaining to this e-mail. Any opinion or views expressed in this e-mail are those of the individual sender and may not represent those of The New Zealand Institute for Plant and Food Research Limited. ______________________________________________ R-help@r-project.org mailing list 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.
