R: Quality indicators of RST decision rules

RI.laplace {RoughSets} | R Documentation

## Quality indicators of RST decision rules

### Description

Functions for extracting quality indices of rules.

### Usage

    RI.laplace(rules, ...)
    RI.support(rules, ...)
    RI.confidence(rules, ...)
    RI.lift(rules, ...)

### Arguments

`rules` | a `"RuleSetRST"` object containing a set of decision rules. See `RI.LEM2Rules.RST`.
`...` | the other parameters (currently omitted).

### Value

A numeric vector with values of the corresponding quality measure.

### Author(s)

Andrzej Janusz

### Examples

    ###########################################################
    ## Example : Filtering a set of decision rules
    ###########################################################
    data(RoughSetData)
    hiring.data <- RoughSetData$hiring.dt

    rules <- RI.LEM2Rules.RST(hiring.data)

    rules

    # a vector of rules' Laplace estimate of the confidence:
    RI.laplace(rules)
    # a vector of rules' confidence values:
    RI.confidence(rules)

    # subsetting a set of rules:
    rules[RI.support(rules) > 0.2]
    rules[RI.lift(rules) < 1.5]

[Package RoughSets version 1.3-7 Index]