On Jan 22, 2010, at 12:01 PM, Na'im R. Tyson wrote:
Thank you for your very prompt response. The authors of the ROCR
package informed me the package works as stated in the documentation
as long as you use R version 2.9.0--and indeed, it does! I do not
mind using a slightly older version
Thank you for your very prompt response. The authors of the ROCR
package informed me the package works as stated in the documentation
as long as you use R version 2.9.0--and indeed, it does! I do not
mind using a slightly older version of R to get the results I need.
It is useful to have
On Jan 22, 2010, at 8:31 AM, Frank E Harrell Jr wrote:
David Winsemius wrote:
On Jan 22, 2010, at 3:53 AM, Na'im R. Tyson wrote:
Dear R-philes,
I am plotting ROC curves for several cross-validation runs of a
classifier (using the function below). In addition to the average
AUC, I am int
David Winsemius wrote:
On Jan 22, 2010, at 3:53 AM, Na'im R. Tyson wrote:
Dear R-philes,
I am plotting ROC curves for several cross-validation runs of a
classifier (using the function below). In addition to the average
AUC, I am interested in obtaining a confidence interval for the
averag
Even though ROC curves don't shed much light on the problem, the area
under the ROC is useful because it is the Wilcoxon-type concordance
probability. Denoting it by C, 2*(C-.5) is Somers' Dxy rank correlation
between predictions and binary Y. You can get the standard error of Dxy
from the Hm
On Jan 22, 2010, at 3:53 AM, Na'im R. Tyson wrote:
Dear R-philes,
I am plotting ROC curves for several cross-validation runs of a
classifier (using the function below). In addition to the average
AUC, I am interested in obtaining a confidence interval for the
average AUC. Is there a st
Dear R-philes,
I am plotting ROC curves for several cross-validation runs of a
classifier (using the function below). In addition to the average
AUC, I am interested in obtaining a confidence interval for the
average AUC. Is there a straightforward way to do this via the ROCR
package?
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