Wow, wonderful! Thank you for all the response -- and so quick! ac
On Wed, Mar 17, 2010 at 2:19 PM, Sarah Goslee <[email protected]> wrote: > How about this? It changes a column to a factor, and > optionally renames it. > > facts <- function(meta, mod, newmodname) { > meta[,mod] <- factor(meta[,mod]) > if(!missing(newmodname)) { > colnames(meta)[colnames(meta) == mod] <- newmodname > } > meta > } > > > testdata <- data.frame(a=c(1,2,3), b=c(1,1,2)) > > str(testdata) > 'data.frame': 3 obs. of 2 variables: > $ a: num 1 2 3 > $ b: num 1 1 2 > > > > test1 <- facts(testdata, "a") > > str(test1) > 'data.frame': 3 obs. of 2 variables: > $ a: Factor w/ 3 levels "1","2","3": 1 2 3 > $ b: num 1 1 2 > > > > test2 <- facts(testdata, "b", "newb") > > str(test2) > 'data.frame': 3 obs. of 2 variables: > $ a : num 1 2 3 > $ newb: Factor w/ 2 levels "1","2": 1 1 2 > > Sarah > On Wed, Mar 17, 2010 at 2:23 PM, Henrique Dallazuanna <[email protected]>wrote: > Try this: > > transform(DF, newA = factor(a), a = NULL) > > On Wed, Mar 17, 2010 at 4:06 PM, AC Del Re <[email protected]> wrote: > > Hi All, > > > > Im interested in creating a function that will convert a variable within > a > > data.frame to a factor while retaining the original name (yes, I know > that I > > can just: var <-factor(var) but I need it as a function for other > > purposes). e.g.: > > > > # this was an attempt but fails. > > > > facts <- function(meta, mod, modname = "spec") { > > meta$mod <- factor(meta$mod) > > colnames(meta)['mod'] <- modname > > return(meta) > > } > > > > # ideally, would like to just specify the data.frame (=meta) and > > # variable to convert to factor (=mod) (similar to function input below). > > But am > > # also interested in having the option to create a new variable and > > # name (similar to the function input above). > > > > facts <- function(meta, mod) { > > meta$mod <- factor(meta$mod) > > return(meta) > > } > > > > Thanks for any help! > > > > AC > > > > [[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. > > > > > > -- > Henrique Dallazuanna > Curitiba-Paraná-Brasil > 25° 25' 40" S 49° 16' 22" O > [[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.
