Yes, integer vector indexing. You haven't provided R code to work with so I will just refer you to read the pdf "An Introduction to R" included with most R installations for more details. --------------------------------------------------------------------------- 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.
Rebecca <rebecca0...@yahoo.cn> wrote: >Hi, >If I have a matrix like >1� 2� 3� 4 >5� 6� 7� 8, >how can I repeat two rows as whole, to be like >1� 2� 3� 4 >5� 6� 7� 8 >1� 2� 3� 4 >5� 6� 7� 8? >� >Since I have more two rows in a matrix and I need to repeat many times, >I wonder whether there is a convenient command to do so. >� >Thanks! > [[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. ______________________________________________ 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.