BishBosh.Attribute.CriterionValue

AUTHOR

Dr. Alistair Ward

DESCRIPTION

• Defines the value of a single criterion, which quantifies the significance of some concept; many such criteria may exist, & their weighted-mean drives automated selection of moves.
• Each criterion-value is normalised into the signed closed unit-interval.

CAVEAT

• While this data-type could implement the classes Num, Fractional & Real, these interfaces would allow one to construct invalid instances.

Types

Data-types

data CriterionValue criterionValue

Quantifies some criterion; the larger the signed value, the better.

Instances

Num criterionValue => Bounded (CriterionValue criterionValue)

Defined in BishBosh.Attribute.CriterionValue

Methods

minBound :: CriterionValue criterionValue

maxBound :: CriterionValue criterionValue

Eq criterionValue => Eq (CriterionValue criterionValue)

Defined in BishBosh.Attribute.CriterionValue

Methods

(==) :: CriterionValue criterionValue -> CriterionValue criterionValue -> Bool

(/=) :: CriterionValue criterionValue -> CriterionValue criterionValue -> Bool

Show criterionValue => Show (CriterionValue criterionValue)

Defined in BishBosh.Attribute.CriterionValue

Methods

showsPrec :: Int -> CriterionValue criterionValue -> ShowS

show :: CriterionValue criterionValue -> String

showList :: [CriterionValue criterionValue] -> ShowS

Constants

zero :: Num criterionValue => CriterionValue criterionValue

Constant.

Functions

calculateWeightedMean :: (Fractional weightedMean, Real criterionValue, Real criterionWeight) => [(CriterionValue criterionValue, CriterionWeight criterionWeight)] -> WeightedMeanAndCriterionValues weightedMean criterionValue

• Calculates the weighted mean of the specified CriterionValues using the corresponding criterion-weights.
• Also writes individual unweighted CriterionValues, to facilitate post-analysis; if the corresponding weight is 0, evaluation of the criterion is, for efficiency, avoided.
• CAVEAT: if all weights are 0, then the result is indeterminate.

Constructor

mkCriterionValue :: (Num criterionValue, Ord criterionValue) => criterionValue -> CriterionValue criterionValue

Smart constructor.