count_triples {SparseMSE}

Count number of triples of overlapping lists

Description

The routine counts the number of subsets of size three of lists such that every pair of lists in the triple overlaps. If the number is zero, then the model with all two-list effects is unidentifiable.

Usage

count_triples(zdat)

Arguments

zdat

Data matrix with t+1 columns. The first t columns, each corresponding to a particular list, are 0s and 1s defining the capture histories observed. The last column is the count of cases with that particular capture history. List names A, B, ... are constructed if not supplied. Where a capture history is not explicitly listed, it is assumed that it has zero count.

Value

a count of subsets of size three of lists such that every pair of lists in the triple overlaps.

Examples

data(Western)
data(Artificial_3)
count_triples(Western)
count_triples(Artificial_3)