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Data preprocessing . Data cleaning: fill in missing values, smooth noisy data, identify or remove outliers, and ... Data transformation: normalization and aggregation

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Data Preprocessing Techniques for Data Mining . Introduction . Data preprocessing- is an often neglected but important step in the data mining process.

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Data Quality Follow Discussions of Ch. 2 of the Textbook Aggregation Sampling Dimensionality Reduction Feature subset selection Feature creation Discretization and ...

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docin › IT计算机 › 数据挖掘与模式识别2014-8-8

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    1 Data Mining: Concepts and Techniques Data Preprocessing — Chapter 3 — 汤世平@cs.bit.edu.cn tangshiping@gmail 2 2 Chapter 3: Data Preprocessing n Data ...

    docin › IT计算机 › 数据挖掘与模式识别2014-8-8

  • Data preprocessing - SlideShare

    Data preprocessing techniques • Data Cleaning • Data Integration • Data Transformation • Data Reduction PAAS Group ... remove noise from data • Aggregation: ...

    • Data Mining: Chapter 3: Data Preprocessing Concepts and ...

    January 17, 2001 Data Mining: Concepts and Techniques 3 Why Data Preprocessing? n Data in the real world is dirty ... n Normalization and aggregation n Data reduction

    Data Preprocessing

    Data Preprocessing G.A.Putri Saptawati The need of data preprocessing Problems with huge real-world database Incomplete data : missing value Noisy Inconsistent ...

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    2013-8-8 1 Data Mining: Concepts and Techniques 2nd lecture Data Preprocessing 2013-8-8 2 2 Outline Data Preprocessing: An Overview Data Quality Major Tasks ...

    docin › IT计算机 › 数据库2014-8-12

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    Data Mining: Concepts and Techniques Data Preprocessing Adapted from: Data Mining Concepts and Techniques, Chapter 2 by Jiawei Han Department of Computer Science

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    Chapter 4 Data Preprocessing To make data more suitable for data mining. To improve the data mining analysis with respect to time, cost and quality.

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    3 September 21, 2010 Data Mining: Concepts and Techniques 9 Major Tasks in Data Preprocessing Data cleaning Fill in missing values, smooth noisy data, identify or remove

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