R help - Nov 2006 - Creating data for logistic regression and Cox proportional hazards regression

I know that mvrnorm from MASS (generously provided by Profs. Venables
and Ripley) can be used to generate multivariable normal data that can
be used in a linear regression with certain desired characteristics
(e.g. a given mean for each variable as well as a given
variance-covariance pattern). Is there any similar facility that can be
used to generate data for (1) a logistic regression and (2) a Cox
proportional hazards regression?  
Thanks,
John
 
 
John Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
Baltimore VA Medical Center GRECC,
University of Maryland School of Medicine Claude D. Pepper OAIC,
University of Maryland Clinical Nutrition Research Unit, and
Baltimore VA Center Stroke of Excellence

University of Maryland School of Medicine
Division of Gerontology
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524

(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)
jsorkin@grecc.umaryland.edu
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John Sorkin wrote:
> I know that mvrnorm from MASS (generously provided by Profs. Venables
> and Ripley) can be used to generate multivariable normal data that can
> be used in a linear regression with certain desired characteristics
> (e.g. a given mean for each variable as well as a given
> variance-covariance pattern). Is there any similar facility that can be
> used to generate data for (1) a logistic regression and (2) a Cox
> proportional hazards regression?  
> Thanks,
> John
See the examples in the help file for the lrm and cph functions in the 
Design package as well as in the spower function in the Hmisc package.

Frank
>  
>  
> John Sorkin M.D., Ph.D.