plot.bivrecSurv {BivRec}R Documentation

Plot Bivariate Alternating Recurrent Series

Description

This function plots bivariate recurrent event gap times from a bivrecSurv object with an option to create separate plots based on categorical covariates.

Usage

## S3 method for class 'bivrecSurv'
plot(
  x,
  y = NULL,
  by,
  type = NULL,
  main = NULL,
  xlab = NULL,
  ylab = NULL,
  col = NULL,
  ...
)

Arguments

x

A bivrecSurv object.

y

Either empty or NULL.

by

A vector or data frame with categorical variables. See details.

type

Optional vector of strings to label Type I and Type II gap times. Default is c("Type I", "Type II").

main

Optional string with plot title. Default is no title (will go to default when using by argument).

xlab

Optional string with label for horizontal axis. Default is "Time".

ylab

Optional string with label for vertical axis. Default is "Individual".

col

Optional string vector with colors to use for each of the gap types. Default is c("red", "blue")

...

Additional arguments to be passed to graphical methods if needed.

Details

Argument by must be a vector or data frame with one or several categorical variables (up to 6 categories each). Plots of the bivariate alternating recurrent outcome will be created by category for each variable. When the by argument is used it overrides the main argument and sets it to its default main="". To avoid errors make sure the vectors used for the bivrecSurv object have the same length as the categorical variables and no missing values.

Examples

## Not run: 
# Simulate bivariate alternating recurrent event data
library(BivRec)
set.seed(28)
bivrec_data <- simBivRec(nsize=100, beta1=c(0.5,0.5), beta2=c(0,-0.5), tau_c=63,
               set=1.1)
plot(x = with(bivrec_data,bivrecSurv(id, epi, xij, yij, d1, d2)), main="Example",
     type = c("In Hospital", "Out of Hospital"))

#Present the data by subgroups
#Note that the covariate a2 in the function will be dropped because it is continuous
attach(bivrec_data)
plot(x = bivrecSurv(id, epi, xij, yij, d1, d2), by = data.frame(a1, a2),
     type = c("In Hospital", "Out of Hospital"))
detach(bivrec_data)

## End(Not run)

[Package BivRec version 1.2.1 Index]