1. 1 Akaho, S. (2008), “Kernel multivariate analysis - new development of nonlinear data analysis-“, Iwanami Shoten, pp.2-34 (in Japanese).
2. 2 Gyrogiken, http://www.gyrogiken.jp/index.html (2019.1.5 access).
3. 3 Huang, H., Lin, D.K.J., Liu, M.Q. and Yang, J.F. (2016), “Computer experiments with both qualitative and quantitative variables”, Technometrics, Vol.58, No.4, pp.495-507.
4. 4 Kanamori, N. (2017), “Introduction to machine learning by R”, Ohmusya, pp.122-127, 215-230 (in Japanese).
5. 5 Loeppky, J.L., Sacks, J. and Welch, W.J. (2009), “Choosing the Sample Size of a Computer Experiment”, Technometrics, Vol.51, No.4, pp.366-376.