Hi Tunga, The function subset() is probably what you are looking for. You might also want to look at a tutorial to understand the R syntax.
In addition, calling your data data is not a good idea because of the name clash with the function data(). Hope this helps, Ulrik On Mon, 27 Feb 2017 at 13:10 Tunga Kantarcı <tungakanta...@gmail.com> wrote: > Consider a data frame named data. data contains 4 columns and 1000 > rows. Say the aim is to bring together columns 1, 2, and 4, if the > values in column 4 is equal to 1. We could use the syntax > > data(data[,4] == 1, c(1 2 4)) > > for this purpose. Suppose now that the aim is to bring together > columns 1, 2, and 4, if the values in column 4 is equal to 1, for the > first 20 rows of column 4. We could use the syntax > > data(data[1:20,4] == 1, c(1 2 4)) > > for this purpose. However, this does not produce the desired result. > This is surprising at least for someone coming from MATLAB because > MATLAB produces what is desired. > > Question 1: The code makes sense but why does it not produce what we > expect it to produce? > > Question 2: What code is instead suitable? > > ______________________________________________ > 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.
