Worked just fine. I had been incorrectly trying tapply(x, l.c.1, quantile(probs=0.75))
rather than tapply(x, l.c.1, quantile, probs=0.75) Thanks for the help - SR Steven H. Ranney On Thu, Mar 24, 2011 at 6:03 PM, Peter Alspach <peter.alsp...@plantandfood.co.nz> wrote: > Tena koe Steven > > The ... argument of the apply series of functions allows one to pass > arguments to the called function. So: > > tapply(x, l.c.1, quantile, probs=0.75) > > should work (although I haven't tested it). > > HTH ..... > > Peter Alspach > >> -----Original Message----- >> From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- >> project.org] On Behalf Of Steven Ranney >> Sent: Friday, 25 March 2011 12:18 p.m. >> To: r-help@r-project.org >> Subject: [R] tapply with specific quantile value >> >> All - >> >> I have an example data frame >> >> x l.c.1 >> 43.38812035 085 >> 47.55710661 085 >> 47.55710661 085 >> 51.99211429 085 >> 51.99211429 095 >> 54.78449958 095 >> 54.78449958 095 >> 56.70201864 095 >> 56.70201864 105 >> 59.66361903 105 >> 61.69573564 105 >> 61.69573564 105 >> 63.77469479 115 >> 64.83191994 115 >> 64.83191994 115 >> 66.98222118 115 >> 66.98222118 125 >> 66.98222118 125 >> 66.98222118 125 >> 66.98222118 125 >> >> and I'd like to get the 3rd quantile by l.c.1 so I use >> >> tapply(x, l.c.1, quantile) >> >> and my output includes all quantiles (i.e., 0, 25%, 50%, 75%, 100%) >> but I'm only interested in the 75% quantile. Is there an additional >> statement or function I can use to get just the quantile that I want? >> >> Thanks for your help - >> >> SR >> Steven H. Ranney >> >> ______________________________________________ >> 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.
