entropy: Calculates Shannon's entropy

In integr: An Implementation of Interaction Graphs of Aleks Jakulin

Description

Formula: H(S) = -P_i * ∑ log_2 * P_i, where P_i is the probability of the corresponding i-th class

Usage

entropy(df, classAtt)

Arguments

df	A discrete data.frame
classAtt	A class column of the df (string)

Value

The Shannon's entropy of the df, based on the classAtt attribute

Examples

entropy(golf, "Play")

Example output

Loading required package: dplyr

Attaching package: ‘dplyr’

The following objects are masked from ‘package:stats’:

    filter, lag

The following objects are masked from ‘package:base’:

    intersect, setdiff, setequal, union

Loading required package: DiagrammeR
Loading required package: DiagrammeRsvg
Loading required package: rsvg
Loading required package: gtools
[1] 0.9401648

integr documentation built on May 24, 2019, 5:06 p.m.