thanks John Kane Kingston ON Canada
> -----Original Message----- > From: peter.kup...@me.com > Sent: Fri, 16 Nov 2012 15:32:23 +0100 > To: sarah.gos...@gmail.com > Subject: Re: [R] Deleting rows with special character > > Hey Sara, > first: Thanks for the fast reply! I checked the apply function and I > found my error. > For sure: I forgot to send an sample data. After sending the mail I > recognized it. Sorry about this! > Once again: Thanks for the fast reply and your help. > Best > Peter > > > > Am 16.11.2012 um 15:26 schrieb Sarah Goslee <sarah.gos...@gmail.com>: > >> Hi Peter, >> >> On Fri, Nov 16, 2012 at 9:04 AM, Peter Kupfer <peter.kup...@me.com> >> wrote: >>> Dear all, >>> maybe a simple problem but I found no solution for my problem. >>> I have a matrix Y with 23 000 rows and 220 colums. The entries are "A", >>> "B" or "C". >> >> A reproducible example with sample data is helpful. >> >>> I want to extract all rows (as a matrix ) of the matrix Y where all >>> entries of a row are (for example) "A". >> >> Really? Why not just make a new matrix with the right number of "A" >> values? >> >>> Is there any solution? I tried the stringr- package but i doesn't work >>> out. >> >> Of course there is. Here's one option. But I'm not sure you've really >> stated your actual problem. This extracts the rows where all values >> are "A", and might at least get you started toward your real problem. >> >> testdata <- matrix(c( >> "A", "B", "C", >> "B", "B", "B", >> "C", "A", "A", >> "A", "A", "A"), >> ncol=3, byrow=TRUE) >> >> testdata.A <- testdata[apply(testdata, 1, function(x)all(x == "A")), , >> drop=FALSE] >> >> >> >> -- >> Sarah Goslee >> http://www.functionaldiversity.org > > ______________________________________________ > 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. ____________________________________________________________ GET FREE SMILEYS FOR YOUR IM & EMAIL - Learn more at http://www.inbox.com/smileys Works with AIM®, MSN® Messenger, Yahoo!® Messenger, ICQ®, Google Talk™ and most webmails ______________________________________________ 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.
