2014 年 41 巻 1 号 p. 115-129
We propose a novel approach to finding an optimal subspace of multi-dimensional variables for identifying a cluster structure of objects. When some variables are irrelevant to the cluster structure and are correlated between themselves, they are likely to have an adverse effect on clustering of objects. In such situations, the proposed method aims to obtain an optimal subspace for partitioning objects by eliminating the effects of these irrelevant variables. The proposed method can be considered an extension of reduced k-means analysis and factorial k-means analysis for the settings where irrelevant variables are correlated. The proposed method is applied for the analyses of artificial and real data to investigate how it performs as compared to the existing methods.