update {elections.dtree}

Update a dirichlet_tree model by observing some ranked ballots.

Description

update updates a Dirichlet-tree model with observations to obtain a posterior distribution on the ranked ballots. See Everest et al. (2022) for implementation details.

Usage

## S3 method for class 'dirichlet_tree'
update(object, ballots, ...)

Arguments

object

A dirichlet_tree object.

ballots

A set of ballots - must be of type prefio::preferences.

...

Unused.

Value

The dirichlet_tree object.

References

Everest F, Blom M, Stark PB, Stuckey PJ, Teague V, Vukcevic D (2023). “Ballot-Polling Audits of Instant-Runoff Voting Elections with a Dirichlet-Tree Model.” In Computer Security. ESORICS 2022 International Workshops, 525–540. ISBN 978-3-031-25460-4..

Everest F, Blom M, Stark PB, Stuckey PJ, Teague V, Vukcevic D (2022). “Auditing Ranked Voting Elections with Dirichlet-Tree Models: First Steps.” doi:10.15157/diss/021..