A Fuzzy Decision Tree Approach To Start A
Genetic Algorithm For Data Classification
Author(s)
R. P. Espíndola & N. F. F. Ebecken
Abstract
This paper introduces a fuzzy decision tree to initiate the first population of a
genetic algorithm to perform data classification. On large datasets, the evolutive
process tends to waste computational resources until some good individual is
found. It is expected that the use of a fuzzy decision tree can significantly reduce
this feature. The genetic algorithm aims to obtain small fuzzy classifiers by
means of optimization of fuzzy rules bases. It is shown how a fuzzy rules base is
generated from a numerical database and how its best subset is found by the
genetic algorithm. The classifiers are evaluated in terms of accuracy, cardinality
and number of features employed. The results obtained are compared with a
known study in the literature and with an academic decision tree tool. The
method was able to produce small fuzzy classifiers with very good performance.
Keywords: classification, feature selection, fuzzy systems, genetic algorithms,
fuzzy decision tree.
1 Introduction
One of the major drawbacks of a genetic algorithm is the high computational
costs on performing its search. When dealing with large datasets, this feature is a
key aspect to be considered. In this work, feature selection [1] and classification
[2] are performed by a fuzzy genetic system. Fuzzy rules are generated
automatically from the datasets and a genetic algorithm is applied to find the
shortest and most accurate subset of rules. As each rule employs only one
feature, the final subset possibly uses few features. In this model of rules, the
classification is done along with a value which estimates the relationship
between the condition and the class, defined by the concept of fuzzy subsethood.
Keywords
classification, feature selection, fuzzy systems, genetic algorithms, fuzzy decision tree.
Related Book
Other papers in this volume
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