# km: Kaplan-Meier Survivor Curves In event: Event History Procedures and Models

## Description

`km` calculates the Kaplan-Meier estimates for survival.

To plot the survivor curve, use `plot()`; for the empirical intensity curve, use `plot.intensity()`; for diagnostic curves to choose a distribution to which the data might belong, use `plot.dist()`.

## Usage

 ```1 2 3 4 5 6 7 8``` ```km(times, censor, group=1, freq=1, cdf=FALSE) ## S3 method for class 'km' plot(x, add=FALSE, xlim=NULL, ylim=c(0,1), main=NULL, xlab="Time", ylab=NULL, lty=NULL, ...) ## S3 method for class 'km' plot.intensity(x, add=FALSE, xlab="Time", ylab="Hazard", type="l", lty=NULL, ...) ## S3 method for class 'km' plot.dist(x, ...) ```

## Arguments

 `times` Vector of times to events or a list of vectors of such times for different individuals. `censor` Vector of censoring indicators corresponding to the vector of times or to the last time in each vector of a list. `group` Vector indicating to which group each individual belongs. `freq` Vector of frequencies for grouped data. `cdf` If TRUE, calculate the cdf instead of the survivor curve. `x` An object produced by `km`. `add` Plotting control options. `main` Plotting control options. `type` Plotting control options. `ylab` Plotting control options. `xlab` Plotting control options. `xlim` Plotting control options. `ylim` Plotting control options. `lty` Plotting control options. `...` Plotting control options.

## Value

A matrix with class, `km`, containing the Kaplan-Meier estimates is returned.

## Author(s)

J.K. Lindsey

`plot.intensity`, `plot.surv`

## Examples

 ```1 2 3 4 5 6 7``` ```surv <- rgamma(40,2,scale=5) cens <- rbinom(40,1,0.9) treat <- gl(2,20) plot(km(surv, cens, group=treat), main="",xlab="Months", ylab="Probability of deterioration") plot.dist(km(surv, cens, group=treat)) plot.intensity(km(surv, cens, group=treat),ylab="Risk of deterioration") ```

### Example output   ```Loading required package: rmutil

Attaching package: ‘rmutil’

The following object is masked from ‘package:stats’:

nobs

The following objects are masked from ‘package:base’:

as.data.frame, units
```

event documentation built on May 2, 2019, 4:07 a.m.