用TFIDF和特征增益两种方式实现了特征向量空间的建立，将文本文件表示成特征向量的形式，为接下来的聚类做了准备。程序用JAVA写成。-TFIDF and features with two ways to gain the feature vector space to achieve the establishment of the text document into the form of feature vector for the next cluster preparation. P