quantile.survfit {RcmdrPlugin.survival}R Documentation

Compute Quantiles for a Survival Function

Description

This methods computes quantiles for a survival function (or survival functions by strata) as returned by survfit. Quantiles are computed conventionally as the last observed event time before each requested quantile. Confidence intervals for the estimated quantiles are obtained from the confidence limits of the etimated survival function.

Usage

## S3 method for class 'survfit':
quantile(x, quantiles = c(0.25, 0.5, 0.75), ...)

Arguments

x a survfit object.
quantiles quantiles to compute, default is 0.25, 0.5, and 0.75.
... not used.

Value

A vector of quantiles (or a matrix, if there are strata).

Author(s)

John Fox <jfox@mcmaster.ca>

See Also

survfit.

Examples

require(survival)
quantile(survfit(Surv(time, status), data=cancer))
quantile(survfit(Surv(time, status) ~ sex, data=cancer))

[Package RcmdrPlugin.survival version 0.7-1 Index]