¾ö²ßÊ÷C4.5Ëã·¨Java´úÂë
- ¼ÓÈë²ËÄñÑ§Ï°Íø£¬»ñµÃÕ䲨×ÊÔ´
Java´úÂë Êý¾ÝÍÚ¾òÖоö²ßÊ÷C4.5Ô¤²âË㷨ʵÏÖ(°ë³ÉÆ·£¬»¹ÒªÐ´¹æÔòºó¼ôÖ¦¼°¶Ô·ÇÀëÉ¢Êý¾ÝÐÅÏ¢ÔöÒæ¼ÆËã) Java´úÂë package org.struct.decisiontree; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.TreeSet; /** * @author Leon.Chen */ public class DecisionTreeBaseC4p5 { /** * root node */ private DecisionTreeNode root; /** * visableArray */ private boolean[] visable; private static final int NOT_FOUND = -1; private static final int DATA_START_LINE = 1; private Object[] trainingArray; private String[] columnHeaderArray; /** * forecast node index */ private int nodeIndex; /** * @param args */ @SuppressWarnings("boxing") public static void main(String[] args) { Object[] array = new Object[] { new String[] { "age", "income", "student", "credit_rating", "buys_computer" }, new String[] { "youth", "high", "no", "fair", "no" }, new String[] { "youth", "high", "no", "excellent", "no" }, new String[] {
Ïà¹ØÎĵµ£º
½éÉÜ
ͨ³££¬Ñз¢ÈËԱʹÓõÄÊÇT-SQLÀ´´´½¨SQL ServerµÄ´æ´¢¹ý³Ì¡¢º¯ÊýºÍ´¥·¢Æ÷¡£ ¶øÏÖÔÚµÄSQL Server 2005ÒÑÍêȫ֧³Ö.NETͨÓÃÓïÑÔÔËÐÐʱ£¨CLR£©ÁË¡£ Õâ¾ÍÒâζ×Å£¬ÄúÄܹ»Ê¹ÓÃ.NETµÄÓïÑÔ£¬ÈçC#¡¢VB.NETÖ®ÀàµÄÀ´Ñз¢SQL ServerµÄ´æ´¢¹ý³Ì¡¢º¯ÊýºÍ´¥·¢Æ÷¡£ SQL Server ºÍ CLR µÄ¼¯³É¸øÎÒÃÇ´øÀ´ÁËn¶àºÃ´¦£¬Èçʵʱ±àÒë¡¢ÀàÐͰ²È«¡ ......
°æÈ¨ËùÓУ¬×ªÔØ×¢Ã÷³ö´¦£¡
×ªÔØÇëЯ´ø´ËÐÅÏ¢£ºhuangfox
-----------------------------------------------------------------
³éÏ󹤳§ºÍ¹¤³§·½·¨ ¸Õ¿ªÊ¼ºÜÈÝÒ×»ìÏý£¬ÖÁÉÙÎÒÊÇÕâÑùµÄ£¡
²»¹ýËûÃDzúÉúµÄÔµÓÉÀ´¿´£¬»¹ÊÇ¿ÉÒԺúÃÇø·ÖµÄ¡£
1.¹¤³§·½·¨£ºÊÇΪÁ˱ÜÃâÓ¦ÓÃÖ±½ÓʵÀýÀà²ã´Î½á¹¹ÖеľßÌåÀ࣬Ìṩһ¸ö·½·¨¸ù¾ÝÔËÐÐÇé ......
½ñÌ츴ϰÁËÒ»ÏÂÕâЩ֪ʶ£¬Ë³±ã×öÁËϱʼÇ.
1.¼Ä´æÆ÷£º×î¿ìµÄ´æ´¢Çø, ÓɱàÒëÆ÷¸ù¾ÝÐèÇó½øÐзÖÅä,ÎÒÃÇÔÚ³ÌÐòÖÐÎÞ·¨¿ØÖÆ.
2. Õ»£º´æ·Å»ù±¾ÀàÐ͵ıäÁ¿Êý¾ÝºÍ¶ÔÏóµÄÒýÓ㬵«¶ÔÏó±¾Éí²»´æ·ÅÔÚÕ»ÖУ¬¶øÊÇ´æ·ÅÔÚ¶Ñ£¨new ³öÀ´µÄ¶ÔÏ󣩻òÕß³£Á¿³ØÖУ¨×Ö·û´®³£Á¿¶ÔÏó´æ·ÅÔÚ³£Á¿³ØÖС££©
3. ¶Ñ£º´æ·ÅËùÓÐnew³öÀ´µÄ¶ÔÏó¡£
4. ¾²Ì¬Óò£ ......
ÃüÃû¹æ·¶
ÏîÄ¿Ãû£º¸÷µ¥´ÊÊ××Öĸ´óд£¬ÆäËü×ÖĸСд
°üÃû£ºÈ«²¿×ÖĸСдÇÒΨһ£¬Í¨³£Îª¹«Ë¾ÓòÃûµÄµ¹Ðò
Ô´ÎļþÃû£º¸÷µ¥´ÊÊ××Öĸ´óд£¬ÆäËü×ÖĸСд
·½·¨Ãû£ºµÚÒ»¸öµ¥´ÊÈ«²¿Ð¡Ð´£¬ÆäÓ൥´ÊÊ××Öĸ´óд£¬ÆäËü×ÖĸСд£¬Ò»°ãӦΪ¶¯´Ê
³ÉÔ±±äÁ¿Ãû£ºµÚÒ»¸öµ¥´ÊÈ«²¿Ð¡Ð´£¬ÆäÓ൥´ÊÊ××Öĸ´óд£¬ÆäËü×ÖĸСд
³ÉÔ±³£Á¿Ãû£ºËùÓе¥ ......