km: Plots an 'enhanced' Kaplan-Meier plot, with base graphics...
In lbraglia/yapomif: Yet another package of misc functions

This function plots a Kaplan-Meier plot.

km(time = NULL, status = NULL, strata = NULL, time.unit = c("days",
  "weeks", "months", "years"), time.by = NULL, main = "", ylab = NULL,
  xlab = NULL, xlim = NULL, ylim = c(0, 1), reverse = FALSE,
  conf.int = NULL, test = c("logr", "hr", "both", "no"),
  plot.n.at.risk = TRUE, gr.legend = NULL, ...)

`time`	survival time variable
`status`	survival indicator variable
`strata`	Stratifying variable (optional)
`time.unit`	Time unit of x axis
`time.by`	Time step x axis (in days)
`main`	Graph main title
`ylab`	Y-axis label.
`xlab`	X-axis label. If NULL a suitable default based on time.unit will be provided
`xlim`	X-axis limit. If NULL a suitable default based on time.unit will be provided
`ylim`	Y-axis limit. Default to c(0,1) be provided
`reverse`	plot cumulative events
`conf.int`	logical ... Plot confidence intervall? If NULL confidence interval are plotted only if strata has two or more levels
`test`	tests: 'no'=don't plot tests, 'logr'=logranktest, 'hr'=hazratio, 'both'=both
`plot.n.at.risk`	Logical value: plot number at risk?
`gr.legend`	Graph command to add legend, as string
`...`	Further `lines.survfit` parameters