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Article type: Cover
2006 Volume 18 Issue 1 Pages
Cover1-
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Article type: Appendix
2006 Volume 18 Issue 1 Pages
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Article type: Index
2006 Volume 18 Issue 1 Pages
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Article type: Index
2006 Volume 18 Issue 1 Pages
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Tohru Uoi
Article type: Article
2006 Volume 18 Issue 1 Pages
1-2
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Tsunenori Ishioka
Article type: Article
2006 Volume 18 Issue 1 Pages
3-13
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We expand a non-hierarchical clustering algorithm that can determine the optimal number of clusters by using iterations of k-means and a stopping rule based on BIG. The procedure requires merging the clusters that a k-means iteration has made to avoid unsuitable division caused by the division order. By using this additional merging operation, the case of adequate clustering was increased for various types of simulation runs. With no prior information about the number of clusters, our method can get the optimal clustering based on information theory instead of on a heuristic method. The computational complexity of our method is ο(N log k) for the sample size N and the number of final clusters, k.
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Ikunori Kobayashi, Junji Nakano, Yoshikazu Yamamoto, Takeshi Fujiwara
Article type: Article
2006 Volume 18 Issue 1 Pages
15-25
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Jasp is a general purpose statistical system, which has been developed by using Java technologies. We have implemented data mining methods on it, by importing well-known data mining Java class library Weka and combining it in Jasp language. This approach can shorten the time of implementation work, keep consistency of the system, and make it easy to collaborate with other Jasp functions. Users can cleanse a dataset, make several graphs of the dataset by Jasp statistical functions, and apply data mining algorithms such as C4.5, PRISM, support vector machine, APRIORI, K-Means, by Weka functions. This version of Jasp is freely available from http://jasp.ism.ac.jp/.
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Mie Fujiki, Shingo Shirahata
Article type: Article
2006 Volume 18 Issue 1 Pages
27-43
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Deepest Regression (DR) is a method for linear regression introduced by Rousseeuw, P.J. & Hubert, M. (1999). The DR estimator is defined as the fit which makes regression depth the maximum relative to the data. In general, the robust regression has the lowering tendency of efficiency a little, but is robust in regression analysis. The DR estimator based on this regression depth is robust, and its lowering in efficiency is small. Whereas the breakdown point is a global measure of reliablity, they also stress the importance of the influence function, which measures the effect of infinitesimal perturbations on the estimator. It turns out that it has high asymptotic efficiency, keeping the breakdown point higher than other robust estimators, as a result of investigating the robustness using them. (Rousseeuw, P.J. & Aelst, S.V., 2000) In this paper, these theoretical character is summarized. It compares with the DR method and other robust methods by the simulation, and the performance evaluation is shown by the results.
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Jun Kikuchi
Article type: Article
2006 Volume 18 Issue 1 Pages
45-49
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Makoto Tomita
Article type: Article
2006 Volume 18 Issue 1 Pages
51-53
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[in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
55-
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
55-
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
55-56
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[in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2006 Volume 18 Issue 1 Pages
58-59
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
59-60
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[in Japanese], [in Japanese], Nick Scott
Article type: Article
2006 Volume 18 Issue 1 Pages
60-
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Article type: Article
2006 Volume 18 Issue 1 Pages
60-
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[in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
60-
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
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[in Japanese]
Article type: Article
2006 Volume 18 Issue 1 Pages
61-62
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Article type: Article
2006 Volume 18 Issue 1 Pages
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Article type: Article
2006 Volume 18 Issue 1 Pages
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2006 Volume 18 Issue 1 Pages
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2006 Volume 18 Issue 1 Pages
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2006 Volume 18 Issue 1 Pages
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Article type: Appendix
2006 Volume 18 Issue 1 Pages
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2006 Volume 18 Issue 1 Pages
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Article type: Appendix
2006 Volume 18 Issue 1 Pages
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Article type: Appendix
2006 Volume 18 Issue 1 Pages
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Article type: Cover
2006 Volume 18 Issue 1 Pages
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