1 code implementation • 6 Sep 2020 • Kohei Yoshikawa, Shuichi. Kawano
We consider the problem of extracting a common structure from multiple tensor datasets.
no code implementations • 7 May 2020 • Kazuaki. Murayama, Shuichi. Kawano
It is confirmed that a multiple kernel relevance vector regression model with good predictive accuracy can be obtained by selecting the scale parameter minimizing extended prediction information criterion.
no code implementations • 30 Mar 2020 • Shengyi Wu, Kaito Shimamura, Kohei Yoshikawa, Kazuaki. Murayama, Shuichi. Kawano
This is called variable fusion.
1 code implementation • 21 Feb 2020 • Shuichi. Kawano
The proposed method enables us to obtain principal component loadings that possess information about both explanatory variables and a response variable.
no code implementations • 20 Nov 2019 • Kaito Shimamura, Shuichi. Kawano
Sparse convex clustering is to cluster observations and conduct variable selection simultaneously in the framework of convex clustering.
1 code implementation • 11 Oct 2019 • Kohei Yoshikawa, Shuichi. Kawano
To overcome this issue, we develop an estimation algorithm with rank and variable selection via sparse regularization and manifold optimization, which enables us to obtain an accurate estimation of the coefficient parameter even if the true rank of the coefficient parameter is high.
no code implementations • 28 Sep 2016 • Shuichi. Kawano, Hironori Fujisawa, Toyoyuki Takada, Toshihiko Shiroishi
The basic loss function is based on a combination of the regression loss and PCA loss.
no code implementations • 16 Feb 2016 • Kaito Shimamura, Masao Ueki, Shuichi. Kawano, Sadanori Konishi
The fused lasso penalizes a loss function by the $L_1$ norm for both the regression coefficients and their successive differences to encourage sparsity of both.
no code implementations • 26 Feb 2014 • Shuichi. Kawano, Hironori Fujisawa, Toyoyuki Takada, Toshihiko Shiroishi
Principal component regression (PCR) is a two-stage procedure that selects some principal components and then constructs a regression model regarding them as new explanatory variables.