I apologize if you have already seen my question. I am new to the mailing list and I did not get any responses the first time I posted my question. However, I am not sure my post went through. Here is my situation: I have a spreadsheet with columns of fish species (text) and length (numbers). In the fish species column I have 5 different fish. I want R to calculate the mean length and standard error for each species. I tried using the stats functin with stats(fishdata, by=species) R told me it could not find function stats. Is there a library I need to install to get stats to work? Mike [[alternative HTML version deleted]]
Have you read an Intro to R or, indeed, any R documentation? Perhaps you received no reply because you do not appear to have made an honest effort to answer the question for yourself. Maybe you should consider accessing R thru R Commander or one of the other R GUI's -- search CRAN for details. -- Bert On Fri, Feb 18, 2011 at 6:45 AM, Mike Gibson <megalops31 at hotmail.com> wrote:> > I apologize if you have already seen my question. ?I am new to the mailing list and I did not get any responses the first time I posted my question. ?However, I am not sure my post went through. > > Here is my situation: > I have a spreadsheet with columns of fish species (text) and length (numbers). ?In the fish species column I have 5 different fish. ?I want R to calculate the mean length and standard error for each species. > > I tried using the stats functin with > stats(fishdata, by=species) > > R told me it could not find function stats. ?Is there a library I need to install to get stats to work? > > Mike > ? ? ? ?[[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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. >-- Bert Gunter Genentech Nonclinical Biostatistics
On Feb 18, 2011, at 9:45 AM, Mike Gibson wrote:> > I apologize if you have already seen my question. I am new to the > mailing list and I did not get any responses the first time I posted > my question. However, I am not sure my post went through.It didn't.> > Here is my situation: > I have a spreadsheet with columns of fish species (text) and length > (numbers). In the fish species column I have 5 different fish. I > want R to calculate the mean length and standard error for each > species. > > I tried using the stats functin with > stats(fishdata, by=species) > > R told me it could not find function stats. Is there a library I > need to install to get stats to work?"stats" is a rather fundamental package that is loaded by default when R starts up, while "mean" is a function in the base package. > ?mean > help(package=stats) It's possible that "stats" is also a function in some other package, but you have not told us why you think so. I can tell you that (at least) 5 different packages have a "describe" function and the base package has "summary". > RSiteSearch("stats") Unfortunately that is not a productive answer to your questions, since it provides more than 1500 hits, not too surprising I suppose since this is a "stats" program. And .... please pay careful attention to the list sig. -- David Winsemius, MD West Hartford, CT