Abstract
Visualization methods are important tools to intuitively understand the relationships between each element in complex data sets. Until now, many visualization methods have been proposed and some of them are used in practice. However, the many existing methods can handle only symmetric data sets in which the relationship between each datum are symmetric and can not be applied to asymmetric data sets as is. Considering that there are many asymmetric data sets, the development of the visualization methods to handle the asymmetric data sets is a significant problem. This paper focuses on existing graph visualization methods based on a spring model and give a proposal to applying the model into asymmetric data set.
