sequentialDVI {dvir}

Sequential DVI search

Description

Performs a sequential matching procedure based on the pairwise LR matrix. In each step the pairing corresponding to the highest LR is selected and included as a match if the LR exceeds the given threshold. By default, (updateLR = TRUE) the pairwise LRs are recomputed in each step after including the data from the identified sample.

Usage

sequentialDVI(
  dvi,
  updateLR = TRUE,
  threshold = 1,
  check = TRUE,
  verbose = TRUE,
  debug = FALSE
)

Arguments

dvi

A dviData object, typically created with dviData().

updateLR

A logical. If TRUE, the LR matrix is updated in each iteration.

threshold

A non-negative number. If no pairwise LR values exceed this, the iteration stops.

check

A logical, indicating if the input data should be checked for consistency.

verbose

A logical, by default TRUE.

debug

A logical, by default FALSE. If TRUE, the LR matrix is printed in each step.

Details

If, at any point, the highest LR is obtained by more than one pairing, the process branches off and produces multiple solutions. (See Value.)

Value

A list with two elements:

• matches: A single assignment vector, or (if multiple branches) a data frame where each row is an assignment vector.

• details: A data frame (or a list of data frames, if multiple branches) including the LR of each identification in the order they were made.

Examples

# Without LR updates
sequentialDVI(example1, updateLR = FALSE)

# With LR updates (default). Note two branches!
r = sequentialDVI(example1)

# Plot the two solutions
plotSolution(example1, r$matches, k = 1)
plotSolution(example1, r$matches, k = 2)

# Add `debug = T` to see the LR matrix in each step
sequentialDVI(example1, debug = TRUE)

# The output of can be fed into `jointDVI()`:
jointDVI(example1, assignments = r$matches)