I think we need a bit more detall of the code that you are using and the structure of the data set.
Would you please supply some sample data (see ?dput for a convenient way to supply data to the R-help list. Also the output of str() would be useful. A good guideline for asking a question in the list can be found at http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example John Kane Kingston ON Canada > -----Original Message----- > From: kath.re...@gmail.com > Sent: Wed, 28 Nov 2012 13:13:32 +0100 > To: r-help@r-project.org > Subject: [R] output data by date? > > Dear Helpers, > > I have a dataset X, with no missing values, everything is in order, R > reads > it correctly, and I have already done some statistical analyses on the > dataset. The data are in order by date (six sampling dates in one year, > earliest to latest) and I now want to generate boxplots for each > parameter > for each date. > > However, R outputs the boxplots in some order that I do not understand > (eg. > 10.5.2011, 11.21.2011, 4.5.2011, 5.17.2011, 6.27.2011, 8.16.2011) instead > of chronologically as the data are in the dataframe. > > I tried reformatting the date field from English (US) to German, just in > case my R was confused, but still R seems to use its own rules. The data > do > not occur in any rank or order with R's way of organizing the dates (not > highest to lowest, or lowest to highest) so I don't know why it is > ordering > the dates as it is. > > This also happened when I ran ANOVAs on the parameters. I got the same > output (mean values and Tukey HSD significance) using the dates formatted > in both ways (whew! I would have really been worried, otherwise!) But now > for the boxplots, which might eventually be included in the paper, I want > to make it easier for the reader to interpret, so would like to have them > ordered from earliest (4.5.2011- April, to 11.21.2011 - November.) > > Does anyone have a suggestion for how I can correct this? > > Thanks very much and my apologies if this has been covered before. I > looked > before posting my question, however, and couldn't find anything. > > -- > Kathleen Regan > > University of Hohenheim > > Institute of Soil Science and Land Evaluation > > Soil Biology Section > > Emil-Wolff-Str. 27 > > D-70593 Stuttgart-Hohenheim > > "Traveler, there is no road. We make the road by walking." > > phone: +49(0)711 459 23118 > > fax: +49(0)711 459 23117 > E-mail:kath.re...@gmail.com > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. ____________________________________________________________ FREE ONLINE PHOTOSHARING - Share your photos online with your friends and family! Visit http://www.inbox.com/photosharing to find out more! ______________________________________________ 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.
