survivalREC (version 1.1)

multidf: Create a multidf object

Description

Creates a "multidf" object, usually used as a response variable in a model formula.

Usage

multidf(gap1, gap2, gap3=NULL, event1, status, event2=NULL, ...)

Value

An object of class "multidf". "multidf" objects are implemented as a single data frame.

Arguments

gap1

First gap time.

gap2

Second gap time.

gap3

Third gap time. By default is NULL.

event1

Indicator of the first time; 0 if the first time is censored and 1 otherwise.

status

Censoring indicator of the survival time of the process; 0 if the total time is censored and 1 otherwise. For instance, for three gap times, status is given by the indicator of the third time.

event2

Indicator of the second time; 0 if the first time is censored and 1 otherwise. By default is NULL.

...

Other options. Additional arguments, such as covariates, can also be included in the data set.

Author

Gustavo Soutinho and Luis Meira-Machado

Details

Arguments in this function must be introduced in the following order: gap1, event1, gap2 and status, where gap1 and gap2 are ordered event times and event1 and status their corresponding indicator statuses. Other arguments can be also added. These should consider intermediate times and corresponding censoring indicators or covariates.

Examples

library(survivalREC)
data("bladder4state")

b3state<-multidf(gap1=bladder4state$y1, event1=bladder4state$d1, 
                 gap2=bladder4state$y2, status=bladder4state$d2, 
                 size=bladder4state$size) 

head(b3state[[1]])

class(b3state)

b4state<-multidf(gap1=bladder4state$y1, event1=bladder4state$d1, 
                 gap2=bladder4state$y2, event2=bladder4state$d2,
                 gap3=bladder4state$y3, status=bladder4state$d3, 
                 size=bladder4state$size)

head(b4state[[1]])