Sorry, please forget about it. I believe that I am very serious when I posted my question.
with thanks abou ______________________ *AbouEl-Makarim Aboueissa, PhD* *Professor, Statistics and Data Science* *Graduate Coordinator* *Department of Mathematics and Statistics* *University of Southern Maine* On Thu, Sep 2, 2021 at 9:42 PM Avi Gross via R-help <r-help@r-project.org> wrote: > What is stopping you Abou? > > Some of us here start wondering if we have better things to do than > homework for others. Help is supposed to be after they try and encounter > issues that we may help with. > > So think about your problem. You supplied data in a file that is NOT in > CSV format but is in Tab separated format. > > You need to get it in to your program and store it in something. It looks > like you have 204 items so 1/3 of those would be exactly 68. > > So if your data is in an object like a vector or data.frame, you want to > choose random number between 1 and 204. How do you do that? You need 1/3 of > the length of the object items, in your case 68. > > Now extract the items with those indices into say A1. Extract all the > rest into a temporary item. > > Make another 68 random indices, with no overlap, and copy those items into > A2 and the ones that do not have those into A3 and you are sort of done, > other than some cleanup or whatever. > > There are many ways to do the above and I am sure packages too. > > But since you have made no visible effort, I personally am not going to > pick anything in particular. > > Had you shown some text and code along the lines of the above and just > wanted to know how to copy just the ones that were not selected, we could > easily ... > > > -----Original Message----- > From: R-help <r-help-boun...@r-project.org> On Behalf Of AbouEl-Makarim > Aboueissa > Sent: Thursday, September 2, 2021 9:30 PM > To: R mailing list <r-help@r-project.org> > Subject: [R] Splitting a data column randomly into 3 groups > > Dear All: > > How to split a column data *randomly* into three groups. Please see the > attached data. I need to split column #2 titled "Data" > > with many thanks > abou > ______________________ > > > *AbouEl-Makarim Aboueissa, PhD* > > *Professor, Statistics and Data Science* *Graduate Coordinator* > > *Department of Mathematics and Statistics* *University of Southern Maine* > > ______________________________________________ > 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.