SF.asFeatureSubset function

Converting custom attribute name sets into a FeatureSubset object

The function can be used to change a custom set of attribute names from a decision table into an object of the FeatureSubset class. It can be useful for converting results of discernibility matrix-based attribute selection methods (i.e. functions FS.all.reducts.computation and FS.one.reduct.computation).

SF.asFeatureSubset(
  colNames,
  decisionTable = NULL,
  attributeNames = NULL,
  type.method = "custom subset",
  model = "custom"
)

Arguments

• colNames: a character vector containing names of attributes from a decision table

• decisionTable: a decision table which contains attributes from colNames, can be NULL and in that case a non-NULL value of attributeNames

  must be given

• attributeNames: a character vector of names of decision table's attributes, can be NULL and in that case a non-NULL value of decisionTable

  must be given

• type.method: an indicator of the method used for selecting the attributes

• model: an indicator of the model used for selecting the attributes

Returns

an object of a class FeatureSubset

Examples

#############################################################
## Example 1:
#############################################################
data(RoughSetData)
wine.data <- RoughSetData$wine.dt
dim(wine.data)

## selection of an arbitrary attribute subset
attrNames = colnames(wine.data)[1:3]
attrNames
class(attrNames)

## convertion into a FeatureSubset object
reduct <- SF.asFeatureSubset(attrNames, wine.data,
                             type.method = "greedy reduct from a discernibility matrix")

class(reduct)
reduct

Author(s)

Andrzej Janusz