On Mon, 25 Aug 2003 07:21:10 -0700 (PDT)
Xao Ping <xao_ping@yahoo.com> wrote:
> Dear ALL:
> Are there any functions available in S-PLUS for computation/drawing ROC
> curves and estimating AUC with its variance?
> Thank you
> Xao Ping
> R&R Pharmakinetics
> Taiwan
>
>
> ---------------------------------
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The rcorr.cens function in the Hmisc library will compute Somers' Dxy rank
correlation and its standard error. Dxy = 2(C-.5) where C=ROC area
(nonparametric estimator from Mann-Whitney U statistic).
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Frank E Harrell Jr Prof. of Biostatistics & Statistics
Div. of Biostatistics & Epidem. Dept. of Health Evaluation Sciences
U. Virginia School of Medicine http://hesweb1.med.virginia.edu/biostat
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