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%iKnow.Classification.Methods.VectorSpace

Class %iKnow.Classification.Methods.VectorSpace Extends Base [ Abstract, Deprecated, System = 4 ]

This Builder Method implementation generates category term weights as a vector per category that exists in the same vector space as the document term vector. The similarity between the document vector and each of the category vectors can then be calculated using euclidean distance or cosine similarity (angle). Alternatively, these weights can be used for a linear regression formula, calculating a score rather than a similarity/distance.

A combination of global term weights (across the corpus), local term weights (within each category) and normalization (per category) is used to calculate these category vectors.

Properties​

CustomTermWeights​

Property CustomTermWeights [ MultiDimensional ];

CategoryLocalTermWeights​

Property CategoryLocalTermWeights As %String(VALUELIST = ",binary,linear,logarithmic") [ InitialExpression = "linear" ];

The per-category term weight factor

CategoryLocalTermMetric​

Property CategoryLocalTermMetric As %String(VALUELIST = ",frequency,spread") [ InitialExpression = "spread" ];

The metric to use for calculating the local term weights

CategoryGlobalTermWeights​

Property CategoryGlobalTermWeights As %String(VALUELIST = ",none,IDF") [ InitialExpression = "IDF" ];

The corpus-wide relevancy factor to take into account when calculating term weights

CategoryNormalization​

Property CategoryNormalization As %String(VALUELIST = ",none,cosine") [ InitialExpression = "none" ];

Whether and how to normalize the category vectors

Methods​

%SetCustomWeight​

Method %SetCustomWeight(pIndex As %Integer, pCategory As %String, pCustomWeight As %Double) As %Status

Sets a custom weight factor for the term at pIndex in pCategory.

%SetCustomWeights​

Method %SetCustomWeights(pIndex As %Integer, ByRef pCustomWeights) As %Status

%OnRemoveTerm​

Method %OnRemoveTerm(pIndex As %Integer) As %Status

Callback invoked whenever an entire term at an index has been removed

%BuildClassificationMethod​

Method %BuildClassificationMethod(ByRef pClassifier As %iKnow.Classification.Definition.Classifier, pVerbose As %Boolean = 1, pIncludeBuilderParams As %Boolean = 1) As %Status

%LoadFromModel​

Method %LoadFromModel(pDefinition As %iKnow.Classification.Definition.Classifier) As %Status

%LoadMethodBuilderProperties​

Method %LoadMethodBuilderProperties(pMethodBuilder As Base) As %Status [ Internal ]