asWide: Convert an object to "wide" or "long" form.

In survMisc: Miscellaneous Functions for Survival Data

Description

Convert an object to "wide" or "long" form.

Usage

asWide(x, ...)

## S3 method for class 'ten'
asWide(x, ...)

asLong(x, ...)

## S3 method for class 'ten'
asLong(x, ...)

Arguments

x	An object of class ten or pred.
...	Additional arguments (not implemented).

Value

A new data.table is returned, with the data in 'wide' or 'long' format.
There is one row for each time point.
For a ten object generated from a numeric or Surv object, this has columns:

t	time.
e	number of events.
n	number at risk.

If derived from a survfit, coxph or formula object, there are additional columns for e and n for each covariate group.

Note

Most methods for ten objects are designed for the 'long' form.

Examples

data("bmt", package="KMsurv")
require("survival")
t1 <- ten(c1 <- coxph(Surv(t2, d3) ~ z3*z10, data=bmt))
asWide(t1)
asLong(asWide(t1))
stopifnot(asLong(asWide(t1)) == ten(ten(t1)))

survMisc documentation built on May 2, 2019, 5:14 p.m.