Tahnk you. But, when I try the command you both suggested I get a NULL as the results.
> names(object1 @ x.values) NULL Where did I go wrong? On Feb 22, 4:34 pm, David Winsemius <dwinsem...@comcast.net> wrote: > On Feb 22, 2010, at 8:05 AM, Jay wrote: > > > > > The function prediction() returns this: > > > Formal class 'performance' [package "ROCR"] with 6 slots > > ..@ x.name : chr "Cutoff" > > ..@ y.name : chr "Accuracy" > > ..@ alpha.name : chr "none" > > ..@ x.values :List of 1 > > .. ..$ : Named num [1:89933] Inf 2.23 2.22 2.17 2.16 ... > > .. .. ..- attr(*, "names")= chr [1:89933] "" "36477" "56800" > > "41667" ... > > ..@ y.values :List of 1 > > .. ..$ : num [1:89933] 0.5 0.5 0.5 0.5 0.5 ... > > ..@ alpha.values: list() > > > Now, since I want to match each prediction with its original case, I > > need to extract the names, i.e. the information in "- attr(*, > > "names")= chr [1:89933] "" "36477" "56800" "41667" ..." so I can use > > it with a simple datafile[names,] query. > > > How do I get these names in plain number formats? > > Not sure what you mean by "plain number formats" but this should get > you a vector of "names" assuming the prediction object is named > "predobject": > > names( predobj...@x.values ) > > If you wanted them "as.numeric", then that is the name of the > appropriate function. > > -- > David > > > > > ______________________________________________ > > r-h...@r-project.org mailing list > >https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://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.
