https://github.com/cran/coxrobust
Revision fc209a6a2ac5055c14dced7fa571148c6b9e743b authored by Filip Borowicz on 05 March 2006, 00:00:00 UTC, committed by Gabor Csardi on 05 March 2006, 00:00:00 UTC
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Tip revision: fc209a6a2ac5055c14dced7fa571148c6b9e743b authored by Filip Borowicz on 05 March 2006, 00:00:00 UTC
version1.0
version1.0
Tip revision: fc209a6
gen_data.Rd
\name{gen_data}
\alias{gen_data}
\title{Generate Data from the Proportional Hazards Regression Model}
\description{
Generates data set from the proportional hazards regression model
without or with contamination.
}
\usage{gen_data(n, beta, cont = 0, p.censor = 0)}
\arguments{
\item{n}{number of observations.}
\item{beta}{vector of regression coefficients.}
\item{cont}{fraction of contaminated observations.}
\item{p.censor}{probability of censoring.}
}
\details{
Covariates are generated independently, each from the standard normal
distribution. Baseline hazard is equal to 1. After generation of survival
times, covariates are replaced by independent \eqn{2N(0,1)+1} variables
in fraction \code{cont} of observations.
}
\value{
Data frame containing the following variables:
\item{time}{vector of survival times.}
\item{status}{vector of censoring status.}
\item{X1, X2, \ldots}{explanatory variables (their number is determined by the
dimension of vector of regression coefficients).}
}
\seealso{
\code{\link{coxph}}, \code{\link{coxr}}
}
\examples{
gen_data(50, c(2,-2), cont = 0.05)
}
\keyword{datagen}
\keyword{survival}
\keyword{robust}
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