Re: [R] ROC Curve: negative AUC
Thanks, Do you know how to correct it? Cheers, Bruno -- View this message in context: http://r.789695.n4.nabble.com/ROC-Curve-negative-AUC-tp4650469p4650530.html Sent from the R help mailing list archive at Nabble.com. __ 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] ROC Curve: negative AUC
On Fri, Nov 23, 2012 at 7:58 AM, brunosm wrote: > Hi all, > > does anyone know why the area under the curve (AUC) is negative? > > I'm using ROC function with a logistic regression, package Epi. > > First time it happens... > > Have you looked at the ROC curve? That should tell you whether there's some strange non-convexity going on or whether the variable is just being put into the calculations backwards. -thomas -- Thomas Lumley Professor of Biostatistics University of Auckland [[alternative HTML version deleted]] __ 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] ROC Curve: negative AUC
wrong direction for ranking On Thu, Nov 22, 2012 at 1:58 PM, brunosm wrote: > the area under the curve (AUC) is negative? > > I'm using ROC function with a logistic regression, package Epi. > > First time it happens... > > Thanks a lot! > > Bruno > -- == WenSui Liu Credit Risk Manager, 53 Bancorp wensui@53.com 513-295-4370 == [[alternative HTML version deleted]] __ 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] ROC Curve: negative AUC
Hi all, does anyone know why the area under the curve (AUC) is negative? I'm using ROC function with a logistic regression, package Epi. First time it happens... Thanks a lot! Bruno -- View this message in context: http://r.789695.n4.nabble.com/ROC-Curve-negative-AUC-tp4650469.html Sent from the R help mailing list archive at Nabble.com. __ 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.
