PMGA: Implement the pool monotone groups algorithm.

In Bioconductor/Icens: NPMLE for Censored and Truncated Data

Implement the pool monotone groups algorithm.

Description

For isotonization problems some increase in speed and decrease in complexity can be achieved through the use of the pool monotone groups algorithm of Y.L. Zhang and M.A. Newton (1997). It isotonizes a weighted and ordered set of values.

Usage

PMGA(est, ww=rep(1, length(est)))

Arguments

est	The vector of values, in the appropriate order.
ww	The weight vector.

Details

To be supplied at some later date.

Value

An object containing the following components:

est	The isotonized estimates.
ww	The weights associated with the isotonized estimates.
poolnum	The number of values pooled in the current estimate.
passes	The number of passes which were required to isotonize the list.

Author(s)

Alain Vandal and Robert Gentleman.

References

Y.L. Zhang and M.A. Newton (1997), http://www.stat.wisc.edu/~newton/newton.html)

See Also

EMICM

Bioconductor/Icens documentation built on Nov. 2, 2024, 7:19 a.m.