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Preface to First Edition - lib

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310 MULTIDIMENSIONAL SCALINGR> plot(voting_sh, pch = ".", xlab = "Dissimilarity",+ ylab = "Distance", xlim = range(voting_sh$x),+ ylim = range(voting_sh$x))R> lines(voting_sh$x, voting_sh$yf, type = "S")Distance5 10 155 10 15DissimilarityFigure 17.4The Shepard diagram for the voting data shows some discrepanciesbetween the original dissimilarities and the multidimensional scalingsolution.17.4 SummaryMultidimensional scaling provides a powerful approach <strong>to</strong> extracting the structurein observed proximity matrices. Uncovering the pattern in this type ofdata may be important for a number of reasons, in particular for discoveringthe dimensions on which similarity judgements have been made.© 2010 by Taylor and Francis Group, LLC

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