I was hoping to calculate the percentile for each date. So group all of one date together, calculating the value of the 2.5 and 97.5 percentile. -- View this message in context: http://r.789695.n4.nabble.com/Calculating-percentiles-for-multiple-dates-tp4638183p4638378.html Sent from the R help mailing list archive at Nabble.com.
Sorry, I've sent this only to the op, forgetting to cc the list. Hello, Percentile of what? You probably have a dataset with dates and a variable, right? What is the nature of that variable? Post a data example: dput(head(myData), 20) # or 30 Copy the output of that command and paste it in a post. Tip: it starts with structure(...etc ... Paste it all, for us to see what your data looks like. Hope this helps, Rui Barradas Em 30-07-2012 17:35, guzzom escreveu:> I was hoping to calculate the percentile for each date. So group all of one > date together, calculating the value of the 2.5 and 97.5 percentile. > > > > -- > View this message in context: http://r.789695.n4.nabble.com/Calculating-percentiles-for-multiple-dates-tp4638183p4638378.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.
Hi, If you look at the output from the given data, the lwr and upr is constant for a particular date.? So, I guess you can use that value as the percentile.? I assume that your statement of grouping all of one date together so as to average out the observations.? In that case, there will be only a single observation per date. A.K.? ?? ----- Original Message ----- From: guzzom <mattguzzo12 at gmail.com> To: r-help at r-project.org Cc: Sent: Monday, July 30, 2012 12:35 PM Subject: Re: [R] Calculating percentiles for multiple dates I was hoping to calculate the percentile for each date. So group all of one date together, calculating the value of the 2.5 and 97.5 percentile. -- View this message in context: http://r.789695.n4.nabble.com/Calculating-percentiles-for-multiple-dates-tp4638183p4638378.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
Hello, Sorry for my earlier post, they show the problem of not providing context. Fortunatelly, arun's post made me realize there was some data posted somwhere after all. So, try this: aggregate(DEPTH ~ LOG_DATE, data = dat1, quantile, probs = c(0.025, 0.975)) LOG_DATE DEPTH.2.5% DEPTH.97.5% 1 37757 0.635225 5.042800 2 37758 0.299250 2.870000 Hope this helps, Rui Barradas Em 30-07-2012 17:35, guzzom escreveu:> I was hoping to calculate the percentile for each date. So group all of one > date together, calculating the value of the 2.5 and 97.5 percentile. > > > > -- > View this message in context: http://r.789695.n4.nabble.com/Calculating-percentiles-for-multiple-dates-tp4638183p4638378.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.