Definice
"Standardization"isdefinedas:"Inthesocialpracticeofeconomy,technology,science,andmanagement,theTheformulation,releaseandimplementationofstandards(standards,regulationsandsystems,etc.)areunifiedtoobtainthebestorderandsocialbenefits."Datanormalizationistoconverttheoriginalmeasurementvalueintoadimensionlessvalue.Byscalingtheattributedataproportionally,theentirevaluerangeofagivenattributeismappedtoanewvaluerangethroughafunction,thatis,eacholdvalueisreplacedbyanewvalue.Thereare3standardizationstrategies.
StandardníMethodOne
——Normalizace Minimum-Max (min-max).
Minimum-Maxnormalizationmaintainstherelationshipbetweentheoriginaldata.IfthefutureinputfallsoutsidetheoriginaldatarangeofA,thismethodwillfacean"out-of-boundserror".
Normativní metoda dvě
——z-scorenormalizace
Whentheactualmaximumandminimumvaluesoftheattributefareunknown,ortheabnormalpointinfluencestheminimum-maximumnormalizationWhenthismethodisuseful.
Normalizační metoda tři
——Normalizace desetinných míst
DecimalscalingnormalizationisnormalizedbymovingthedecimalpointpositionofattributeA.