Theory of T-norms and fuzzy inference methods
Fuzzy Sets and Systems - Special memorial volume on fuzzy logic and uncertainly modelling
Adaptation in natural and artificial systems
Adaptation in natural and artificial systems
Probability
C4.5: programs for machine learning
C4.5: programs for machine learning
Induction of fuzzy decision trees
Fuzzy Sets and Systems
Genetic algorithms + data structures = evolution programs (3rd ed.)
Genetic algorithms + data structures = evolution programs (3rd ed.)
A simple but powerful heuristic method for generating fuzzy rules from numerical data
Fuzzy Sets and Systems
On a class of weak triangular norm operators
Information Sciences: an International Journal
Identification of linguistic fuzzy models by means of genetic algorithms
Fuzzy model identification
An experiment in linguistic synthesis with a fuzzy logic controller
International Journal of Human-Computer Studies - Special issue: 1969-1999, the 30th anniversary
On the optimization of fuzzy decision trees
Fuzzy Sets and Systems
Genetic Algorithms in Search, Optimization and Machine Learning
Genetic Algorithms in Search, Optimization and Machine Learning
Fuzzy Sets and Systems: Theory and Applications
Fuzzy Sets and Systems: Theory and Applications
Machine Learning
Application of Fuzzy Rule Induction to Data Mining
FQAS '98 Proceedings of the Third International Conference on Flexible Query Answering Systems
A complete fuzzy decision tree technique
Fuzzy Sets and Systems - Theme: Learning and modeling
Fuzzy decision trees: issues and methods
IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics
FHC: The fuzzy hyper-prototype clustering algorithm
International Journal of Knowledge-based and Intelligent Engineering Systems - Intelligent Information Processing: Techniques and Applications
Hi-index | 0.00 |
This paper introduces a novel Fuzzy Numeric Inference Strategy (FNIS) which induces fuzzy trees that can be applied to data domains where the outcome can be either numeric or discrete. The methodology applies the principles of fuzzy theory to pre-generated crisp decision trees in order to soften the sharp decision boundaries that are inherent in such induction techniques. Introducing fuzziness around a tree node allows classification knowledge to be represented more naturally and in-line with human thinking thus creating more robust trees when handling imprecise or conflicting information. The FNIS methodology first extrapolates rules from crisp decision trees. Each attribute is then fuzzified using a Genetic Algorithm (GA) to determine the size of the fuzzy partitions around each tree node automatically. A fuzzy decision tree is then created using a one-to-one mapping and a genetically optimised pre-selected fuzzy inference technique is used to combine all information throughout the tree. FNIS uses two strategies for defuzzification, depending on the type of the outcome variable. For discrete values the traditional centre of gravity approach is adopted, whilst for predicting numeric outcomes a novel method of defuzzification is proposed. CHAID is a successfully proven algorithm for inducing decision trees which can solve both classification and regression problems. It is used to illustrate the creation of fuzzy trees through the proposed strategy. A series of experiments is carried out to compare the performance of crisp trees with FNIS induced fuzzy trees, using real world datasets. The results are shown to compare favourably with other fuzzy and crisp decision tree algorithms. The fuzzy trees are also shown to be more robust leading to improved classification/prediction over crisp trees.