[R] Extract information from S4 object
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? __ 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.
Re: [R] Extract information from S4 object
Try this: names(o...@x.values) On Mon, Feb 22, 2010 at 11:05 AM, Jay josip.2...@gmail.com 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? __ 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. -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40 S 49° 16' 22 O __ 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.
Re: [R] Extract information from S4 object
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-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. __ 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.
Re: [R] Extract information from S4 object
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.
Re: [R] Extract information from S4 object
On 02/22/2010 08:46 AM, Jay wrote: 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 pred...@x.values is a list. The first element of the list pred...@x.values[[1]] is a numeric vector. The numeric vector has names. So names(pred...@x.values[[1]]). Martin 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. -- Martin Morgan Computational Biology / Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N. PO Box 19024 Seattle, WA 98109 Location: Arnold Building M1 B861 Phone: (206) 667-2793 __ 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.
