https://stackoverflow.com/questions/2315601/understanding-the-order-function
Do a web search on "How does order() work R" or similar for more. I can't explain with() any better than the docs: saying that it evaluates the expression argument in the data argument environment -- a data frame for the data frame method -- probably won't help you. -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Mon, Aug 12, 2019 at 7:20 PM Sorkin, John <jsor...@som.umaryland.edu> wrote: > I want to sort a DF, temp, on two columns, patid and time. I have searched > the internet and found code that I was able to modify to get my data > sorted. Unfortunately I don't understand how the code works. I would > appreciate it if someone could explain to me how the code works. Among > other questions, despite reading, I don't understand how with() works, nor > what it does in the current setting. > > code: > data4xsort<-temp[ > with( temp, order(temp[,"patid"], temp[,"time"])), > ] > > Thank you, > John > > > > > > John David Sorkin M.D., Ph.D. > Professor of Medicine > Chief, Biostatistics and Informatics > University of Maryland School of Medicine Division of Gerontology and > Geriatric Medicine > Baltimore VA Medical Center > 10 North Greene Street > GRECC (BT/18/GR) > Baltimore, MD 21201-1524 > (Phone) 410-605-7119 > (Fax) 410-605-7913 (Please call phone number above prior to faxing) > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
