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數(shù)據(jù)挖掘、機(jī)器學(xué)習(xí)和weka-文庫吧資料

2025-05-22 09:02本頁面
  

【正文】 本記錄 ? Attribute: 數(shù)據(jù)字段 – Nominal: outlook: sunny = no – Ordinal: 距離無法度量,如 hot mild cool – Interval: 距離可度量,如整數(shù) – Ratio: 如 % 輸入: Preparing the input* ? Gathering the data together – The data must be assembled, integrated, and cleaned up( Data Warehousing) – Selecting the right type and level of aggregation is usually critical for success ? 屬性類型: ? ARFF文件格式(備注: ) ? 支持兩種基本類型: nominal and numeric, 盡可能用前者 ? 屬性值 ? Missing value: 去掉該樣本、替代、(用 ?來表示字段值) ? Inaccurate value: 一粒老鼠屎 —— 需要領(lǐng)域知識! ? Getting to know your data! ? 數(shù)據(jù)清理一個耗時、費力,卻很重要的過程, ? Garbage in, garbage out! 輸出: Knowledge representation ? Decision tables ? Decision trees ? Classification rules ? If a and b then x ? Association rules: 多個結(jié)果 ? If … then outlook=sunny and humidity=high ? Rules with exceptions () ? If … then … except… else … except… ? Trees for numeric prediction ? Instancebased representation ? Clusters 算法: The basic methods ? Simplicityfirst: simple ideas often work very well ? Very simple classification rules perform well on most monly used datasets (Holte 1993) ? Inferring rudimentary rules ( 算法: 1R、 1Rule) ? Statistical modeling( 算法: Na239。 – to mit to memory。 – This book is about—— Techniques for finding and describing structural patterns in data. – structural patterns表示法:表、樹、規(guī)則 概念: Machine Learning ? To learn: – to get knowledge of study, experience, or being taught。 – About solving problems by analyzing data already present in databases。 ? 數(shù)據(jù)挖掘( data Mining) 只是 KDD/ML的一個重要組成部分。數(shù)據(jù)挖掘 — 實用機(jī)器學(xué)習(xí)技術(shù)及 Java實現(xiàn) ? 原書 – 英文版 《 Data Min
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