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Dindscal: direct INDSCAL

Trendafilov, Nickolay (2012). Dindscal: direct INDSCAL. Statistics and Computing, 22(2) pp. 445–454.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1007/s11222-011-9235-2
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Abstract

The well-known INDSCAL model for simultaneous metric multidimensional scaling (MDS) of three-way data analyzes doubly centered matrices of squared dissimilarities. An alternative approach, called for short DINDSCAL, is proposed for analyzing directly the input matrices of squared dissimilarities. An important consequence is that missing values can be easily handled. The DINDSCAL problem is solved by means of the projected gradient approach. First, the problem is transformed into a gradient dynamical system on a product matrix manifold (of Stiefel sub-manifold of zero-sum matrices and non-negative diagonal matrices). The constructed dynamical system can be numerically integrated which gives a globally convergent algorithm for solving the DINDSCAL. The DINDSCAL problem and its solution are illustrated by well-known data routinely used in metric MDS and INDSCAL. Alternatively, the problem can also be solved by iterative algorithm based on the conjugate (projected) gradient method, which MATLAB implementation is enclosed as an appendix.

Item Type: Journal Article
Copyright Holders: 2011 Springer Science+Business Media, LLC
ISSN: 0960-3174
Keywords: three-way data; metric multidimensional scaling; missing values; dynamical system on matrix manifold; projected conjugate gradient
Academic Unit/Department: Mathematics, Computing and Technology > Mathematics and Statistics
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Item ID: 29119
Depositing User: Sara Griffin
Date Deposited: 18 Jul 2011 08:50
Last Modified: 03 Dec 2012 12:05
URI: http://oro.open.ac.uk/id/eprint/29119
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