Namespace lm.prepro

Data preprocessing related classes and functions

Classes List

Attribute	LISp-Miner data-mining Attribute of an unspecified type
AttributeGroup	Group of categorized attributes
Category	Attribute category (enumeration of values or discretized interval)
CategoryEnumeration	Attribute category defined by enumeration of values
CategoryInterval	Attribute category defined by interval of values
Interval	Interval definition for category of type interval

Properties List

No preperties defined.

Functions List

findAttribute ()	Tries to look-up a Attribute with a unique property given as parameter. Just one parameter has to be specified. Returns nil if Attribute with this property doesn't exists.
findAttributeGroup ()	Tries to look-up a AttributeGroup with a unique property given as parameter. Just one parameter has to be specified. Returns nil if AttributeGroup with this property doesn't exists.
getRootAttributeGroup ()	Returns the one and only root AttributeGroup in this metabase
prepareAttributeArray ()	Returns array of Attributes in this metabase
prepareAttributeGroupArray ()	Returns array of AttributeGroups in this metabase

Properties

Functions

findAttribute() : Attribute

Tries to look-up a Attribute with a unique property given as parameter. Just one parameter has to be specified. Returns nil if Attribute with this property doesn't exists.

Parameters

• luaTable - to store named parameters

Optional named parameters

• nID : integer - an ID of the attribute to look-up
• pDataTable : DataTable - database table with column the attribute should be based upon. Should be specified if there are two or more database tables
• name : string - a name of the attribute to look-up

Returns

• Attribute - or nil

findAttributeGroup() : AttributeGroup

Tries to look-up a AttributeGroup with a unique property given as parameter. Just one parameter has to be specified. Returns nil if AttributeGroup with this property doesn't exists.

Parameters

• luaTable - to store named parameters

Optional named parameters

• nID : integer - an ID of the group of attributes to look-up
• name : string - a name of the group of attributes to look-up

Returns

• AttributeGroup - or nil

getRootAttributeGroup() : AttributeGroup

Returns the one and only root AttributeGroup in this metabase

Returns

• AttributeGroup - root attribute group

prepareAttributeArray() : luaTable

Returns array of Attributes in this metabase

Parameters

• luaTable - to store named parameters

Optional named parameters

• pDataTable : DataTable - database table with columns the attributes should be based upon
• pDataColumn : DataColumn - database table column the attributes should be based upon

Returns

• luaTable

prepareAttributeGroupArray() : luaTable

Returns array of AttributeGroups in this metabase

Returns

• luaTable