Introduction
The purpose of MDS is dimension reduction for mapping high dimensional data into low dimensional space, normally two or threedimensional space, to visualize them using dissimilarity information between each data points. We will demonstrate the highly scalable parallel implementation of SMACOF, which is an MDS algorithm based on EM like iterative method, using MPI and C# language. Using the MPI_SMACOF implementation, we visualize two real application data of chemical compound and biological data, which are in 155dimensional space and 957–dimensional space respectively, into 3–dimensional space.

