ncomb {dvir}

The number of assignments for DVI problem

Description

The number of victims and missing persons of each sex is given. The number of possible assignments, i.e., the number of ways the victims can be identified with the missing persons, is calculated.

Usage

ncomb(nVfemales, nMPfemales, nVmales, nMPmales)

Arguments

nVfemales

Integer. The number of female victims.

nMPfemales

Integer. The number of female missing persons.

nVmales

Integer. The number of male victims.

nMPmales

Integer. The number of male missing persons.

Value

The total number of possible assignments.

Examples

# Example
m1 = ncomb(5,5,5,5) #

# Example: 3 male victims; 2 male missing persons.
# The number of a priori possible assignments is
m1 = ncomb(0,0,3,2) # 13


# Compare with the complete list of assignments
m2 = expand.grid.nodup(list(V1 = c("*", "M1", "M2"),
                            V2 = c("*", "M1", "M2"),
                            V3 = c("*", "M1", "M2")))
stopifnot(m1 == nrow(m2))