adding logical vector to data frame
R version? This works correctly in R-devel. Yes, using $ on data frame subverts some of the conversions, but logical variables are full-status variables now.
On 7 Sep 2001, Thomas Vogels wrote:
Hello. I'm afraid that I'm missing something very obvious this afternoon... When I add a column to a data.frame (by assigning to a "new" column name a logical vector), I thought that I had (at least) 3 options to do so: R> j <- data.frame (x=1:2) R> j$y <- c(TRUE,FALSE) #assignment 1 R> str(j) `data.frame': 2 obs. of 2 variables: $ x: int 1 2 $ y: logi TRUE FALSE R> j[["y"]] <- c(TRUE,FALSE) #assignment 2 R> str(j) `data.frame': 2 obs. of 2 variables: $ x: int 1 2 $ y: Factor w/ 2 levels "FALSE","TRUE": 2 1 R> j[["y"]] <- I(c(TRUE,FALSE)) #assignment 3 R> str(j) `data.frame': 2 obs. of 2 variables: $ x: int 1 2 $ y:Class 'AsIs' logi [1:2] TRUE FALSE Why is assignment 1 not identical to either assignment 2 or 3? Is there a method dispatch skipped? Thanks! -tom -- mailto:tov at ece.cmu.edu (Tom Vogels) Tel: (412) 268-6638 FAX: -3204 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._