Covariance Operator Based Dimensionality Reduction with Extension to Semi-Supervised Settings

Minyoung Kim, Vladimir Pavlovic
; Proceedings of the Twelth International Conference on Artificial Intelligence and Statistics, PMLR 5:280-287, 2009.

Abstract

We consider the task of dimensionality reduction for regression (DRR) informed by real-valued multivariate labels. The problem is often treated as a regression task where the goal is to find a low dimensional representation of the input data that preserves the statistical correlation with the targets. Recently, Covariance Operator Inverse Regression (COIR) was proposed as an effective solution that exploits the covariance structures of both input and output. COIR addresses known limitations of recent DRR techniques and allows a closed-form solution without resorting to explicit output space slicing often required by existing IR-based methods. In this work we provide a unifying view of COIR and other DRR techniques and relate them to the popular supervised dimensionality reduction methods including the canonical correlation analysis (CCA) and the linear discriminant analysis (LDA). We then show that COIR can be effectively extended to a semi-supervised learning setting where many of the input points lack their corresponding multivariate targets. A study of benefits of proposed approaches is presented on several important regression problems in both fully-supervised and semi-supervised settings.

Cite this Paper


BibTeX
@InProceedings{pmlr-v5-kim09a, title = {Covariance Operator Based Dimensionality Reduction with Extension to Semi-Supervised Settings}, author = {Minyoung Kim and Vladimir Pavlovic}, booktitle = {Proceedings of the Twelth International Conference on Artificial Intelligence and Statistics}, pages = {280--287}, year = {2009}, editor = {David van Dyk and Max Welling}, volume = {5}, series = {Proceedings of Machine Learning Research}, address = {Hilton Clearwater Beach Resort, Clearwater Beach, Florida USA}, month = {16--18 Apr}, publisher = {PMLR}, pdf = {http://proceedings.mlr.press/v5/kim09a/kim09a.pdf}, url = {http://proceedings.mlr.press/v5/kim09a.html}, abstract = {We consider the task of dimensionality reduction for regression (DRR) informed by real-valued multivariate labels. The problem is often treated as a regression task where the goal is to find a low dimensional representation of the input data that preserves the statistical correlation with the targets. Recently, Covariance Operator Inverse Regression (COIR) was proposed as an effective solution that exploits the covariance structures of both input and output. COIR addresses known limitations of recent DRR techniques and allows a closed-form solution without resorting to explicit output space slicing often required by existing IR-based methods. In this work we provide a unifying view of COIR and other DRR techniques and relate them to the popular supervised dimensionality reduction methods including the canonical correlation analysis (CCA) and the linear discriminant analysis (LDA). We then show that COIR can be effectively extended to a semi-supervised learning setting where many of the input points lack their corresponding multivariate targets. A study of benefits of proposed approaches is presented on several important regression problems in both fully-supervised and semi-supervised settings.} }
Endnote
%0 Conference Paper %T Covariance Operator Based Dimensionality Reduction with Extension to Semi-Supervised Settings %A Minyoung Kim %A Vladimir Pavlovic %B Proceedings of the Twelth International Conference on Artificial Intelligence and Statistics %C Proceedings of Machine Learning Research %D 2009 %E David van Dyk %E Max Welling %F pmlr-v5-kim09a %I PMLR %J Proceedings of Machine Learning Research %P 280--287 %U http://proceedings.mlr.press %V 5 %W PMLR %X We consider the task of dimensionality reduction for regression (DRR) informed by real-valued multivariate labels. The problem is often treated as a regression task where the goal is to find a low dimensional representation of the input data that preserves the statistical correlation with the targets. Recently, Covariance Operator Inverse Regression (COIR) was proposed as an effective solution that exploits the covariance structures of both input and output. COIR addresses known limitations of recent DRR techniques and allows a closed-form solution without resorting to explicit output space slicing often required by existing IR-based methods. In this work we provide a unifying view of COIR and other DRR techniques and relate them to the popular supervised dimensionality reduction methods including the canonical correlation analysis (CCA) and the linear discriminant analysis (LDA). We then show that COIR can be effectively extended to a semi-supervised learning setting where many of the input points lack their corresponding multivariate targets. A study of benefits of proposed approaches is presented on several important regression problems in both fully-supervised and semi-supervised settings.
RIS
TY - CPAPER TI - Covariance Operator Based Dimensionality Reduction with Extension to Semi-Supervised Settings AU - Minyoung Kim AU - Vladimir Pavlovic BT - Proceedings of the Twelth International Conference on Artificial Intelligence and Statistics PY - 2009/04/15 DA - 2009/04/15 ED - David van Dyk ED - Max Welling ID - pmlr-v5-kim09a PB - PMLR SP - 280 DP - PMLR EP - 287 L1 - http://proceedings.mlr.press/v5/kim09a/kim09a.pdf UR - http://proceedings.mlr.press/v5/kim09a.html AB - We consider the task of dimensionality reduction for regression (DRR) informed by real-valued multivariate labels. The problem is often treated as a regression task where the goal is to find a low dimensional representation of the input data that preserves the statistical correlation with the targets. Recently, Covariance Operator Inverse Regression (COIR) was proposed as an effective solution that exploits the covariance structures of both input and output. COIR addresses known limitations of recent DRR techniques and allows a closed-form solution without resorting to explicit output space slicing often required by existing IR-based methods. In this work we provide a unifying view of COIR and other DRR techniques and relate them to the popular supervised dimensionality reduction methods including the canonical correlation analysis (CCA) and the linear discriminant analysis (LDA). We then show that COIR can be effectively extended to a semi-supervised learning setting where many of the input points lack their corresponding multivariate targets. A study of benefits of proposed approaches is presented on several important regression problems in both fully-supervised and semi-supervised settings. ER -
APA
Kim, M. & Pavlovic, V.. (2009). Covariance Operator Based Dimensionality Reduction with Extension to Semi-Supervised Settings. Proceedings of the Twelth International Conference on Artificial Intelligence and Statistics, in PMLR 5:280-287

Related Material