generateSurvData {safestats}

Generate Survival Data which Can Be Analysed With the 'survival' Package

Description

Generate Survival Data which Can Be Analysed With the 'survival' Package

Usage

generateSurvData(
  nP,
  nT,
  alpha = 1,
  lambdaP,
  lambdaT,
  seed = NULL,
  nDigits = 0,
  startTime = 1,
  endTime = 180,
  orderTime = TRUE,
  competeRatio = 0
)

Arguments

nP

integer > 0 representing the number of of patients in the placebo group.

nT

integer > 0 representing the number of of patients in the treatment group.

alpha

numeric > 0, representing the shape parameter of the Weibull distribution. If alpha=1, then data are generated from the exponential, i.e., constant hazard. For alpha > 1 the hazard increases, if alpha < 1, the hazard decreases.

lambdaP

The (relative) hazard of the placebo group.

lambdaT

The (relative) hazard of the treatment group.

seed

A seed number.

nDigits

numeric, the number of digits to round of the random time to

startTime

numeric, adds this to the random times. Default 1, so the startTime is not 0, which is the start time of rweibull.

endTime

The endtime of the experiment.

orderTime

logical, if TRUE then put the data set in increasing order

competeRatio

The ratio of the data that is due to competing risk.

Value

A data set with time, status and group.

Examples

generateSurvData(800, 800, alpha=1, lambdaP=0.008, lambdaT=0.008/2)