基于判别分析的半监督聚类方法

与无监督聚类相比，半监督聚类是利用一部分先验信息来更好地挖掘和理解数据的内在结构，并紧密遵从用户的偏好。现有的典型半监督聚类算法仅仅适合于低维数据，文中提出一种新颖的基于判别分析的半监督聚类算法来解决高维数据聚类问题。新算法首先使用主成分分析来投影高维数据，进一步在投影空间中，使用基于球形K均值聚类算法对数据聚类；然后利用聚类结果，使用线性判别分析降维输入空间数据；最后在投影空间中对数据再次聚类。在一组真实数据集上的实验表明，所提出的算法不仅可以有效地处理高维数据，还提高了聚类性能。

Semi-supervised clustering approach with discriminant analysis

The semi-supervised clustering is to mine and help to understand better the structure of unlabeled data and to more closely conform to the user's preferences using those supervised data,in comparison with unsupervised clustering.Most existing semi-supervised clustering methods are designed for handling low-dimensional data.In this paper,a novel Semi-supervised Cluster ing Approach with Discriminant Analysis(SCADA) is presented for clustering the high-dimensional data.Specifically,the data are first mapped onto the low-dimensional space by principal component analysis such that constrained spherical K-means algorithm is used to cluster those transformed data.Secondly,linear discriminant analysis is used to reduce the number of the dimensionality of the data in terms of the clustering results.Finally,the data in the embedded space are clustered.Indeed,the experimental results on several real-world data sets show the SCADA method can effectively deal with the high-dimensional data and provides an appealing clustering performance.