📄 c4_5rules.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>Manpage of C4.5</TITLE>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<STYLE TYPES="text/css">DIV.section {
MARGIN-LEFT: 2cm
}
</STYLE>
<LINK REL=StyleSheet HREF="../../../../stylesheet/main.css" TYPE="text/css">
<META content="MSHTML 6.00.2800.1276" name=GENERATOR></HEAD>
<BODY>
<blockquote>
<H1>C4.5RULES</H1>
<HR>
<A name=lbAB> </A>
<H2>NAME</H2>
<P>c4.5rules - form production rules from unpruned decision trees <A
name=lbAC> </A>
<H2>SYNOPSIS</H2>
<P><B>c4.5rules</B> [ <B>-f</B> filestem ] [ <B>-u</B> ] [ <B>-v</B> verb ] [
<B>-F</B> siglevel ] [ <B>-c</B> cf ] [ <B>-r</B> redundancy ] <A
name=lbAD> </A>
<H2>DESCRIPTION</H2>
<P><I>C4.5rules </I>reads the decision tree or trees produced by C4.5 and
generates a set of production rules from each tree and from all trees together.
All files read and written by C4.5 are of the form <I>filestem.ext</I> where
<I>filestem</I> is a file name stem that identifies the induction task and
<I>ext</I> is an extension that defines the type of file. The Rules program
expects to find a <B>names file</B> defining class, attribute and attribute
value names, a <B>data file</B> containing a set of objects whose class and
value of each attribute is specified, a <B>unpruned file</B> generated by C4.5
from the <B>data file,</B> and (optionally) a <B>test file</B> containing unseen
objects.
<P>For each tree that it finds, the program generates a set of pruned rules, and
then sifts this set in an attempt to find the most useful subset of them. If
more than one tree was found, all subsets are then merged and the resulting
composite set of rules is then sifted. The final set of rules is saved in a
machine-readable format in a <B>rules</B> file. Each of the rulesets produced is
then evaluated on the original training data and (optionally) on the test data.
<P><A name=lbAE></A>
<H2>OPTIONS</H2>
<P>
<DL compact>
<DT><B>-f</B><I>filestem</I>
<DD>Specify the filename stem (default <B>DF).</B>
<DT><B>-u</B>
<DD>Evaluate rulesets on unseen cases in file <I>filestem.test.</I>
<DT><B>-v</B><I>verb</I>
<DD>Set the verbosity level [0-3] (default 0).
<DT><B>-F</B><I>siglevel</I>
<DD>Invoke Fisher's significance test when pruning rules. If a rule contains a
condition whose probability of being irrelevant is greater than the stated
level, the rule is pruned further (default: no significance testing).
<DT><B>-c</B><I>cf</I>
<DD>Set the confidence level used in forming the pessimistic estimate of a
rule's error rate (default 25%).
<DT><B>-r</B><I>redundancy</I>
<DD>If many irrelevant or redundant attributes are included, estimate the
ratio of attributes to ``sensible'' attributes (default 1). </DD></DL>
<P><A name=lbAF></A>
<H2>FILES</H2>
<P>c4.5 <BR>c4.5rules <BR>filestem.data <BR>filestem.names <BR>filestem.unpruned
(unpruned trees) <BR>filestem.rules (production rules) <BR>filestem.test (unseen
data)
<P><A name=lbAG></A>
</blockquote></BODY></HTML>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -