On Jan 18, 2013, at 3:13 PM, Jeff Newmiller wrote: > If you have a lot of names to change, or you need to do it regularly, you can > use something like: > > renames <- read.table(text= > "oldname newname > constant c > numbers b > ", header=TRUE, as.is=TRUE ) > names(seba)[match(renames$oldname, names(seba))] <- renames$newnames
Thnks Jeff; I like it, plan to add it to my import scripts, ... although the 'newname' column is misspelled. If you have a set of target variable and a diverse set of input variables that need to be mapped to a constant set of names and a re thinking of incorporating in a function, it might be better with: names(newdat)[ match(renames[['oldname']], names(newdat))] <- renames[['newsource3']] save(renames, file="name_map_data.rda") > > --------------------------------------------------------------------------- > Jeff Newmiller The ..... ..... Go Live... > DCN:<[email protected]> 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. > > Rui Barradas <[email protected]> wrote: > >> Hello, >> >> Try the following. >> >> >> names(seba)[grep("numbers", names(seba))] <- "b" >> names(seba)[grep("constant", names(seba))] <- "c" >> >> names(seba) I would think that it might be dangerous if there were multiple column names that contained either "numbers" or "data". >> >> >> Hope this helps, >> >> Rui Barradas >> >> Em 18-01-2013 18:14, Sebastian Kruk escreveu: >>> I have a data. frame to which you want to change the names to some of >> their >>> columns. >>> >>> For example: >>> >>>> seba <- data.frame ('constant' = 3, 'numbers' = 1: 10, 'letters' = >> LETTERS >>> [1:10], otros = 2:11) >>> >>> List their names: >>> >>>> names (Seba) >>> [1] "constant" "numbers" "letters" >>> >>> I want to rename c the column called constant and b the column >>> called numbers. >>> >>> I do not know in which order appear names. >>> >>> How could do it? >>> >>> Thanks in advance, >>> >>> Sebastian. >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> [email protected] 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. >>> >> >> ______________________________________________ >> [email protected] 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. > > ______________________________________________ > [email protected] 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. David Winsemius Alameda, CA, USA ______________________________________________ [email protected] 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.
