survival (version 2.9-6)

survreg.old: 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"),
fixed)

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. (When I implement the t-dist, it will include the degrees of freedom).

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

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