plot.phreg: Plots output from a phreg regression

In eha: Event History Analysis

Plots output from a phreg regression

Description

Plot(s) of the hazard, density, cumulative hazards, and/or the survivor function(s) for each stratum.

Usage

## S3 method for class 'phreg'
plot(
  x,
  fn = c("haz", "cum", "den", "sur"),
  main = NULL,
  xlim = NULL,
  ylim = NULL,
  xlab = "Duration",
  ylab = "",
  col,
  lty,
  printLegend = TRUE,
  score = 1,
  fig = TRUE,
  ...
)

Arguments

x	A phreg object
fn	Which function should be plotted? Default is the hazard function(s).
main	Header for the plot
xlim	x limits
ylim	y limits
xlab	x label
ylab	y label
col	Color(s) for the curves. Defaults to black.
lty	Line type for the curve(s). Defaults to 1:(No. of strata).
printLegend	Logical, or character ("topleft", "bottomleft", "topright" or "bottomright"); if TRUE or character, a legend is added to the plot if the number of strata is two or more.
score	Multiplication factor for the hazard function.
fig	logical, should the graph be drawn? If FALSE, data is returned.
...	Extra parameters passed to 'plot' and 'lines'.

Value

No return value if fig = TRUE, otherwise the cumulative hazards function (coordinates), given fn = "cum".

Note

Reference hazard is given by the fit; zero for all covariates, and the reference category for factors.

Author(s)

Göran Broström

See Also

phreg

Examples

y <- rllogis(40, shape = 1, scale = 1)
x <- rep(c(1,1,2,2), 10)
fit <- phreg(Surv(y, rep(1, 40)) ~ x, dist = "loglogistic")
plot(fit)

eha documentation built on Oct. 1, 2023, 1:07 a.m.