survreg.old             package:survival             R Documentation

Old (survival4) Regression for a parametric survival model

Description:

     This routine is a backwards-compatible interface to the improved
     survreg function, which is better.

Usage:

     survreg.old(formula, data=sys.frame(sys.parent()), ..., link=c("log",
     "identity"),dist=c("extreme", "logistic", "gaussian",
     "exponential","rayleigh","weibull"), fixed=list())

Arguments:

 formula: a formula expression as for other regression models. See the
          documentation for 'lm' and 'formula' for details. 

    data: optional data frame in which to interpret the variables
          occuring in the formula. 

     ...: other arguments to 'survreg'

    link: transformation to be used on the y variable. 

    dist: assumed distribution for the transformed y variable. 

   fixed: a list of fixed parameters, most often just the scale. 

Value:

     an object of class 'survreg' is returned, which inherits from
     class 'glm'.

Examples:

     data(ovarian)
     survreg.old(Surv(futime, fustat) ~ ecog.ps + rx, ovarian, dist='extreme',
                     link='log', fixed=list(scale=1))   #Fit an exponential

