This function allows to obtain explanation of an alternative assignment to a specific class interval or one class in case if assignment is necessary. The function returns all preferential reducts for an assignment relation.
explainAssignment(alternative, classInterval, problem)
Index of an alternative.
Problem for which computations will be performed.
List of all preferential reducts for an assignment relation.
If the assignment is not influenced by restrictions then empty list will be returned.
Each element of the list is a preferential reduct represented as a vector
of restriction indices. To identify preferential core use
To find out about restrictions by their indices use
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perf <- matrix(c(5, 2, 1, 7, 0.5, 0.9, 0.4, 0.5), ncol = 2) problem <- buildProblem(perf, 3, FALSE, c('g', 'g'), c(0, 0)) problem <- addAssignmentsLB(problem, c(1, 2), c(2, 3)) possibleAssignments <- calculateAssignments(problem, FALSE) alternative <- 4 assignment <- c(min(which(possibleAssignments[alternative, ])), max(which(possibleAssignments[alternative, ]))) preferentialReducts <- explainAssignment(alternative, assignment, problem) preferentialCore <- getPreferentialCore(preferentialReducts) coreRestrictions <- getRestrictions(problem, preferentialCore)
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