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.
