Tsuneki Sakakibara1) and Yukio Ohsawa2)
1)Center for Spatial Information Science , University of Tokyo, Japan
2)Graduate School of Business Sciences, University of Tsukuba , Japan
KeyGraph is one of the most powerful visualization methods in data mining. However, KeyGraph sometime generate complex diagram, and it makes difficult to understand what knowledge the KeyGraph shows. To overcome this difficulty, we developed a preprocessing method to generate more simplified KeyGraph. To apply this method repeatedly, we can generate plural KeyGraphs with different complexity from one data set. In this paper, we explain key concept of the preprocessing method and the result of its first attempt.