Assess the safety of a preliminary result for an election
testDeletions.RdBallots are deleted at random from the ballot-box, with election results
computed once per dinc ballot-deletions. The experiment terminates after a
specified number of ballots have been deleted, or a specified number of
ballot-counts have occurred. Note: these ballot-counts are correlated. Use
testFraction()
to experiment with independently-drawn samples from the ballot-box.
Usage
testDeletions(
votes,
countMethod = "stv",
countArgs = list(),
dstart = NULL,
dinc = NULL,
dlimit = NULL,
drep = NULL,
rankMethod = "safeRank",
exptName = NULL,
equiet = FALSE,
everbose = FALSE
)Arguments
- votes
A set of ballots, as in vote_2.3.2
- countMethod
"stv" (default) or "condorcet"
- countArgs
List of args to be passed to
countMethod(in addition tovotes)- dstart
Number of ballots in the first ballot-count (selected at random from
votes, without replacement)- dinc
Number of ballots to be deleted in subsequent steps
- dlimit
Maximum number of ballots to delete (in addition to
dstart)- drep
Maximum number of elections (required if
dinc=0)- rankMethod
"safeRank" (default), "elected", or "rank". "rank" is a total ranking of the candidates, with ties broken at random. "elected" assigns rank=1 to elected candidates, rank=2 for eliminated candidates.
- exptName
stem-name of experimental units e.g. "E". If
NULL, then a 3-character string of capital letters is chosen at random.- equiet
TRUE to suppress all experimental output
- everbose
TRUE to produce diagnostic output from the experiment
Examples
data(food_election)
testDeletions(food_election)
#> Number of ballots counted by stv: 20, 18, 16, 14, 12, 10, 8, 6, 4, 2
#>
#> Results of testDeletions at 2023-01-18 01:51:21
#>
#> Dataset = food_election, countMethod = stv, rankMethod = safeRank
#>
#> | | dstart| dinc| dlimit| drep|
#> |:------------|------:|----:|------:|----:|
#> |otherFactors | 20| 2| 2| 10|
#>
#> Unit factors: initSample, removedBallots
#>
#> Experiment ID, number of ballots in simulated election, ranks, winning margins:
#>
#> |exptID | nBallots| Oranges| Pears| Chocolate| Strawberries| Sweets| m.Oranges| m.Pears| m.Chocolate| m.Strawberries| m.Sweets|
#> |:------|--------:|-------:|-----:|---------:|------------:|------:|---------:|--------:|-----------:|--------------:|--------:|
#> |CDS0 | 20| 2| 2| 1| 2| 2| 6.0000000| 0.000000| 8.000000| 4.5548889| 2.777444|
#> |CDS1 | 18| 2| 2| 1| 2| 2| 6.0000000| 0.000000| 6.000000| 3.3994000| 2.599600|
#> |CDS2 | 16| 2| 2| 1| 2| 2| 6.0000000| 2.000000| 4.000000| 2.6660417| 0.000000|
#> |CDS3 | 14| 1| 1| 1| 1| 1| 5.0000000| 1.000000| 8.000000| 2.3327619| 1.999571|
#> |CDS4 | 12| 1| 1| 1| 1| 1| 4.0000000| 0.000000| 7.000000| 2.3326667| 1.666333|
#> |CDS5 | 10| 1| 1| 1| 1| 1| 3.0000000| 0.000000| 6.000000| 1.9994000| 1.666267|
#> |CDS6 | 8| 1| 1| 1| 1| 1| 3.0000000| 1.000000| 4.000000| 1.3323333| 1.000000|
#> |CDS7 | 6| 1| 1| 1| 1| 1| 3.0000000| 1.000000| 2.000000| 1.0000000| 0.000000|
#> |CDS8 | 4| 1| 1| 1| 1| 1| 1.6656667| 1.665667| 2.665667| 0.6656667| 0.000000|
#> |CDS9 | 2| 1| 1| 1| 1| 1| 0.3323333| 1.000000| 1.000000| 0.0000000| 0.000000|
testDeletions(food_election, countMethod="stv",
countArgs=list(complete.ranking=TRUE))
#> Number of ballots counted by stv: 20, 18, 16, 14, 12, 10, 8, 6, 4, 2
#>
#> Results of testDeletions at 2023-01-18 01:51:21
#>
#> Dataset = food_election, countMethod = stv, rankMethod = safeRank
#>
#> | | complete.ranking|
#> |:---------|----------------:|
#> |countArgs | TRUE|
#>
#>
#> | | dstart| dinc| dlimit| drep|
#> |:------------|------:|----:|------:|----:|
#> |otherFactors | 20| 2| 2| 10|
#>
#> Unit factors: initSample, removedBallots
#>
#> Experiment ID, number of ballots in simulated election, ranks, winning margins:
#>
#> |exptID | nBallots| Oranges| Pears| Chocolate| Strawberries| Sweets| m.Oranges| m.Pears| m.Chocolate| m.Strawberries| m.Sweets|
#> |:------|--------:|-------:|-----:|---------:|------------:|------:|---------:|-------:|-----------:|--------------:|---------:|
#> |GIA0 | 20| 2| 2| 1| 2| 2| 4| 2| 8| 6.777111| 3.8885556|
#> |GIA1 | 18| 2| 2| 1| 2| 2| 3| 2| 8| 6.090273| 3.9087273|
#> |GIA2 | 16| 2| 2| 1| 2| 2| 3| 1| 7| 6.132633| 3.1997000|
#> |GIA3 | 14| 2| 2| 1| 2| 2| 2| 1| 7| 6.184407| 2.4812593|
#> |GIA4 | 12| 3| 3| 1| 2| 3| 2| 1| 6| 4.249125| 0.7498750|
#> |GIA5 | 10| 3| 3| 1| 2| 3| 2| 0| 5| 3.570571| 0.7617619|
#> |GIA6 | 8| 2| 2| 1| 2| 2| 2| 0| 4| 3.888056| 0.7776111|
#> |GIA7 | 6| 2| 2| 1| 2| 2| 1| 0| 4| 3.199200| 0.7998000|
#> |GIA8 | 4| 2| 2| 1| 2| 2| 1| 0| 2| 2.332333| 0.0000000|
#> |GIA9 | 2| 3| 3| 1| 2| 3| 0| 0| 2| 1.665667| 0.0000000|