optics算法 [RD,CD,order]=optics(x,k)； Aim: Ordering objects of a data set to obtain the clustering structure Input: x - data set (m,n) m-objects 对象数, n-variables 变量数 k - number of objects in a neighborhood of the selected object-OPTICS Ordering

基于余弦聚类的OPTICS聚类算法，能够用于文本聚类-This is the OPTICS clustering algorithm based on cosine distance which can be used in text clustering.