Mahout包含许多实现，包括聚类、分类、推荐过滤、频繁子项挖掘。此外，通过使用 Apache Hadoop 库，Mahout 可以有效地扩展到云中。(Mahout includes many implementations, including clustering, classification, recommendation filtering, frequent sub item mining. In addition, by using the Apache Hadoop librar

给定10000个用户和他们对10000个电影的评价，然后通过协同过滤或梯度下降算法，用训练集训练数据，预测出用户对未看的电影的评分，并与测试集对比验证预测结果的准确性(You can learn Chinese,and read the Chinese introduction.)