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From |
Steven Samuels <sjhsamuels@earthlink.net> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: iweights and ROC curves |

Date |
Thu, 11 Dec 2008 20:04:10 -0500 |

On Dec 11, 2008, at 7:30 PM, Steven Samuels wrote:

Do not use iweights.-lroc- after -logistic- with frequency weightsworks fine..Austin Nichols once pointed out that you can compute fweights thatgive the same results as pweights to any number of decimal places:For k decimal places, use new frequency weight = round(10^k * probability weight,1) So for 2 decimal places: 233.43 -> 23,343 a whole number. -Steve On Dec 11, 2008, at 1:30 PM, Patrick McCabe wrote:Does any one know if the ROC curves produced by a logisticregression model using svy subpopulation and importance weightsare 'legit'? The resulting model is the same as the modelproduced with pweights but if you use pweights lroc does not work.* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: iweights and ROC curves***From:*Patrick McCabe <patrickj.mccabe@verizon.net>

**Re: st: iweights and ROC curves***From:*Steven Samuels <sjhsamuels@earthlink.net>

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