Icens (version 1.44.0)

Macmat: A function to compute the incidence matrix for an intersection graph.

Description

Returns the Petrie matrix and Petrie pairs of an interval order given its list of maximal antichains. These can be obtained from Maclist.

Usage

Macmat(ml)

Arguments

ml

A list containing the maximal cliques of the intersection graph of the data.

Value

A list containing two components.

pmat

The Petrie or clique matrix of the underlying interval order.

ppairs

The Petrie pairs for each observation. These indicate the first and last maximal clique occupied by the observation.

Details

Not worth mentioning?

References

Computational Methods for Censored Data using Intersection Graphs, R. Gentleman and A. Vandal, JCGS, 2000.

See Also

Maclist

Examples

   data(cosmesis)
   csub1 <- subset(cosmesis, subset=Trt==0, select=c(L,R))
   ml1 <- Maclist(csub1)
   mm1 <- Macmat(ml1)