New in Release 2.05

Attribute usage for rules

A summary showing the relevance of attributes to classifying cases was introduced in Release 2.04. The definition of "usage" for rulesets has been changed in this release so that the information is more consistent across ruleset and tree classifiers.

In Release 2.04, an attribute was considered to have been "used" if its value was required to determine which rules applied to a case. This definition proved unsatisfactory because it depended on the order in which rule conditions were checked, and also because many attributes ended up having usage figures around 100%. In Release 2.05, an attribute is "used" to classify a case when it referenced by one or more conditions of an applicable rule (i.e., a rule whose conditions are all satisfied by a case). Usage figures for trees and rulesets are now more similar.

Bug fix: case weight attributes and cost files

A bug in Release 2.04 could cause problems for applications with two classes that used both a case weight attribute and a .costs file.

Bug fix (Windows only): interactive interpreter

Previous releases could sometimes give incorrect results for boosted classifiers.

Click here for information on updates in previous releases.

For Licensees Only:

Licensees who purchased See5/C5.0 within the last 12 months are welcome to upgrade to Release 2.05.

Click the appropriate link(s) below to download Release 2.05. You will be asked to re-enter your licence ID before using the system. If you use the source code for reading and interpreting See5/C5.0 classifiers, you should also download the latest version.

C5.0 (Linux/Solaris):

• Linux (32-bit)
• Linux (AMD64, EM64T)
• Sun (Solaris)

See5 (Windows 2000/Xp/Vista):

• Single-computer licence
• Network licence

Either: source code for reading/interpreting classifiers

• gzipped tar file
• zip archive

© RULEQUEST RESEARCH 2007

Last updated November 2007