int_info: Create start/end times and interval information

In pammtools: Piece-Wise Exponential Additive Mixed Modeling Tools for Survival Analysis

Create start/end times and interval information

Description

Given interval breaks points, returns data frame with information on interval start time, interval end time, interval length and a factor variable indicating the interval (left open intervals). If an object of class ped is provided, extracts unique interval information from object.

Usage

int_info(x, ...)

## Default S3 method:
int_info(x, min_time = 0L, ...)

## S3 method for class 'data.frame'
int_info(x, min_time = 0L, ...)

## S3 method for class 'ped'
int_info(x, ...)

## S3 method for class 'pamm'
int_info(x, ...)

Arguments

x	A numeric vector of cut points in which the follow-up should be partitioned in or object of class ped.
...	Currently ignored.
min_time	Only intervals that have lower borders larger than this value will be included in the resulting data frame.

Value

A data frame containing the start and end times of the intervals specified by the x argument. Additionally, the interval length, interval mid-point and a factor variable indicating the intervals.

See Also

as_ped ped_info

Examples

## create interval information from cut points
int_info(c(1, 2.3, 5))

## extract interval information used to create ped object
tdf <- data.frame(time=c(1, 2.3, 5), status=c(0, 1, 0))
ped <- tdf %>% as_ped(Surv(time, status)~., id="id")
int_info(ped)

pammtools documentation built on July 26, 2023, 6:07 p.m.