A) Please remove "->" from your vocabulary. Also, always put spaces on either side of an assignment so the parser doesn't get confused.
B) This is a pretty basic question. ("a"==my.data$letters.1.10.) is a vector of logical values. ( ("a"==my.data$letters.1.10.) & ("k"==my.data$letters.1.20.) ) is a (potentially) more restrictive vector of logical values. If you index just one vector you can get one value: my.data$letters.1.10.[ ("a"==my.data$letters.1.10.) & ("k"==my.data$letters.1.20.) ], though it seems easier to just specify "a". How about rownames(my.data) <- my.data$letters.1.10. ? --------------------------------------------------------------------------- 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. Sverre Stausland <john...@fas.harvard.edu> wrote: Dear helpers, how can I extract only the values from a row in a data frame? Using [X,] doesn't do the trick: > data.frame(letters[1:10],letters[11:20])->my.data > my.data[1,] letters.1.10. letters.11.20. 1 a k I would like to be able to extract only the values "a" and "k" without getting the row names and column names with them. I'm asking because I want to assign the character values from a row as the names of the columns of the data frame. Best Sverre _____________________________________________ 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. [[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.