... and if this is what is wanted, somewhat cleaner and more generalizable for programming would be:
do.call(c, mydata[,1:3]) ## where the column indices might have to be adjusted to get the desired columns. Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll On Wed, Apr 29, 2015 at 11:51 PM, Jim Lemon <drjimle...@gmail.com> wrote: > Hi Olufemi, > I sounds like you have a data frame (let's call it "mydata") with at > least three elements (columns). You may be trying to use c() in this > way: > > y1to3<-c(y1,y2,y3) > > in which case it won't work. However: > > y1to3<-c(mydata$y1,mydata$y2,mydata$y3) > > might do what you want, substituting whatever the name of your data > frame is for "mydata". > > Jim > > > On Thu, Apr 30, 2015 at 1:20 PM, Jeff Newmiller > <jdnew...@dcn.davis.ca.us> wrote: >> I am sure you can use c() because columns may be vectors even though vectors >> are not columns, but you really need to follow the posting guide and provide >> a reproducible example for us to show you how. You might find [1] helpful, >> in particular as it describes the use of the dput function to give us a few >> rows of your data. >> >> [1] >> http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example >> --------------------------------------------------------------------------- >> Jeff Newmiller The ..... ..... Go Live... >> DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... >> Live: OO#.. Dead: OO#.. Playing >> Research Engineer (Solar/Batteries O.O#. #.O#. with >> /Software/Embedded Controllers) .OO#. .OO#. rocks...1k >> --------------------------------------------------------------------------- >> Sent from my phone. Please excuse my brevity. >> >> On April 29, 2015 7:48:24 PM PDT, Olufemi Bolarinwa <dafemli...@yahoo.co.uk> >> wrote: >>>Thank you Jeff for your response. >>>My y1, y2, y3 are actually 3 columns in the data so I cannot use the >>>c() function to concatenate them. I am confusing the "columns" with >>>vectors. I actually meant columns. >>>Any help will be much appreciated >>>Olufemi >>> >>> >>> >>>On Wednesday, 29 April 2015, 22:31, Jeff Newmiller >>><jdnew...@dcn.davis.ca.us> wrote: >>> >>> >>>Vectors are not "columns" or "rows". Use the c() function to >>>concatenate vectors. >>>--------------------------------------------------------------------------- >>>Jeff Newmiller The ..... ..... Go >>>Live... >>>DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live >>>Go... >>> Live: OO#.. Dead: OO#.. Playing >>>Research Engineer (Solar/Batteries O.O#. #.O#. with >>>/Software/Embedded Controllers) .OO#. .OO#. >>>rocks...1k >>>--------------------------------------------------------------------------- >>> >>>Sent from my phone. Please excuse my brevity. >>> >>>On April 29, 2015 6:56:46 PM PDT, Olufemi Bolarinwa >>><dafemli...@yahoo.co.uk> wrote: >>>>Hello,I am estimating a system of nonlinear equation where I need to >>>>stack my vector of y. I have data of about 6000units. I tried using >>>the >>>>rbind but instead of having a vector of 1 by 18000, it is giving me a >>>3 >>>>by 6000 so that my matrix multiplication is non-conformable. The stack >>>>command requires an identifier but in this case, I do not have a >>>unique >>>>identifier. >>>>I would like to stack the the first 6000 units of y1 on the 2nd 6000 >>>>units of y2 and 6000 units of y3. >>>>Any help will be greatly appreciated. >>>>ThanksOlufemi >>>> >>>> >>>> >>>> [[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. >> >> ______________________________________________ >> 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. > > ______________________________________________ > 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. ______________________________________________ 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.
