Drawing numbers of subjects at-risk of experiencing an event below Kaplan-Meier and Aalen-Johansen plots.

This function is invoked and controlled by plot.prodlim.

Usage

atRisk(
  x,
  newdata,
  times,
  line,
  col,
  labelcol = NULL,
  interspace,
  cex,
  labels,
  title = "",
  titlecol = NULL,
  pos,
  adj,
  dist,
  xdist,
  adjust.labels = TRUE,
  show.censored = FALSE,
  unit = "npc",
  ...
)

Arguments

x: an object of class `prodlim' as returned by the prodlim function.
newdata: see plot.prodlim
times: Where to compute the atrisk numbers.
line: Distance of the atrisk numbers from the inner plot.
col: The color of the text.
labelcol: The color for the labels. Defaults to col.
interspace: Distance between rows of atrisk numbers.
cex: Passed on to mtext for both atrisk numbers and labels.
labels: Labels for the at-risk rows.
title: Title for the at-risk labels
titlecol: The color for the title. Defaults to 1 (black).
pos: The value is passed on to the mtext argument at for the labels (not the atrisk numbers).
adj: Passed on to mtext for the labels (not the atriks numbers).
dist: If line is missing, the distance of the upper most atrisk row from the inner plotting region: par()$mgp[2].
xdist: Distance in x-axis direction to define the distance between the labels and the numbers at-risk. Deftaults to strwidth("MM",cex=cex).
adjust.labels: If TRUE the labels are left adjusted.
show.censored: If TRUE the cumulative number of subjects lost to follow up is shown in parentheses.
unit: The graphical coordinate systems unit to convert from when line2user is calling grconvertX and grconvertY. Default is 'npc'
...: Further arguments that are passed to the function mtext.

Value

Nil

Details

This function should not be called directly. The arguments can be specified as atRisk.arg in the call to plot.prodlim.

Author

Thomas Alexander Gerds <tag@biostat.ku.dk>