Aintmap: Create A matrix and intmap

In glrt: Generalized Logrank Tests for Interval-censored Failure Time Data

Description

This function is borrowed from package interval by Professor Michael Fay and used in function ModifiedEMICM to provide an NPMLE of a survival function. The A matrix is an n by m matrix of zeros and ones, where each row represents one of n failure times, and each column represents a possible interval for the nonparametric maximum likelihood estimate (NPMLE). The function Aintmap creates an A matrix and associated intmap from left and right intervals (L and R) which may not include the boundary of the interval (using Lin or Rin). The matrix intmap denotes the intervals of the potential jumps in the distribution of the NPMLE, and its attribute LRin denotes whether to include each of the interval or not.

Usage

Aintmap(L, R, Lin = NULL, Rin = NULL)

Arguments

L	numeric vector of left endpoints of censoring interval
R	numeric vector of right endpoints of censoring interval
Lin	logical vector, should L be included in the interval? (see details)
Rin	logical vector, should R be included in the interval? (see details)

Value

A list with two objects:

A	an n by m matrix of 0 and 1s
intmap	the associated intmap

Author(s)

Michael Fay

See Also

ModifiedEMICM

Examples

Aintmap(c(2,3,3,7),c(3,5,5,8),Lin=c(FALSE,TRUE,FALSE,FALSE),
Rin=c(TRUE,FALSE,TRUE,FALSE))

glrt documentation built on May 2, 2019, 8:31 a.m.