C4.5: Programs for Machine Learning (Paperback)
J. Ross Quinlan
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Classifier systems play a major role in machine learning and knowledge-based systems, and Ross Quinlan's work on ID3 and C4.5 is widely acknowledged to have made some of the most significant contributions to their development. This book is a complete guide to the C4.5 system as implemented in C for the UNIX environment. It contains a comprehensive guide to the system's use , the source code (about 8,800 lines), and implementation notes. The source code and sample datasets are also available for download (see below).
C4.5 starts with large sets of cases belonging to known classes. The cases, described by any mixture of nominal and numeric properties, are scrutinized for patterns that allow the classes to be reliably discriminated. These patterns are then expressed as models, in the form of decision trees or sets of if-then rules, that can be used to classify new cases, with emphasis on making the models understandable as well as accurate. The system has been applied successfully to tasks involving tens of thousands of cases described by hundreds of properties. The book starts from simple core learning methods and shows how they can be elaborated and extended to deal with typical problems such as missing data and over hitting. Advantages and disadvantages of the C4.5 approach are discussed and illustrated with several case studies.
This book and software should be of interest to developers of classification-based intelligent systems and to students in machine learning and expert systems courses.
J. Ross Quinlan, University of New South Wales
- 1 Introduction
2 Constructing Decision Trees
3 Unknown Attribute Values
4 Pruning Decision Trees
5 From Trees to Rules
7 Grouping Attribute Values
8 Interacting with Classification Models
9 Guide to Using the System
11 Desirable Additions
Appendix: Program Listings
- Release 8 does not correspond exactly to the version referred to in the book, Release 5
- this software is compatible with Sun IPC or ELC workstation
- please note following restrictions:
This software is distributed "as is," without warranty of any kind, either expressed or implied, including but not limited to implied warranties of merchantability or fitness for a particular purpose. It is Copyright 1987, 1988, 1989, 1990, 1991, 1992 by J.R. Quinlan. All rights reserved. This software may not be distributed in any form without permission of the copyright holder.