关键词: 主分量分析, 分类, 疣猴类

Abstract: This paper demonstrates the basic diselpline，development of principal components analysis (PCA) and it's utilization in classlfication of animals. 6 craniofacial and cranial variables coming from 5 genera of Asia colnbines，including Rhinopithecus，Presbytiscus，Presbytis pyga thrix and Nasatis，were taken as exaples ．The results showed that craniofacial structure is dominant in classification of Asia colobines．The significant craniofacial and cranial morphological differences exist between Presbytis and Nasalis; Rhinopithecus and Nasalis；and between Rhinopithecus and Presbytis ．

Key words: Principal CompOnents Analysis-(PCA), Classlfication, Colobines