聚类分析文献英文翻译.rar

　　Clustering
5.1 INTRODUCTION
　　　Clustering is similar to classification in that data are grouped. However, unlike classification, the groups are not predefined. Instead, the grouping is accomplished by finding similarities between data according to characteristics found in the actual data. The groups are called clusters. Some authors view clustering as a special type of classification. In this text, however, we follow a more conventional view in that the two are different. Many definitions for clusters have been proposed:
　　　Set of like elements. Elements from different clusters are not alike.