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Analyzing Spatial Models of Choice and Judgment with R

Chapter 4: Analyzing Similarities and Dissimilarities Data

Code Files:



double_center_nations.r: Metric multidimensional scaling of nations similarities data using double-centering (the Torgerson solution).

Dataset: nations.Rda



optim_nations.r: Metric multidimensional scaling of nations similarities data using numerical optimization.

Dataset: nations.Rda



smacof_metric_nations.r: Metric multidimensional scaling of nations similarities data using SMACOF.

Dataset: nations.Rda



smacof_metric_nations_missing.r: Metric multidimensional scaling of nations similarities data with missing data using SMACOF.

Dataset: nations.Rda



smacof_metric_nations_rotated.r: Metric multidimensional scaling of nations similarities data with missing data using SMACOF; rotates solution.

Dataset: nations.Rda



smacof_nonmetric_nations.r: Non-metric multidimensional scaling of nations similarities data using SMACOF.

Dataset: nations.Rda



smacof_nonmetric_nations_Procrustes_rotation.r: Non-metric multidimensional scaling of nations similarities data using SMACOF; performs Procrustes rotation.

Dataset: nations.Rda



smacof_metric_nonmetric_senate_90.r: Metric and non-metric multidimensional scaling of 90th Senate agreement score data using SMACOF; generates Shepard diagrams.

Dataset: senate.90.Rda



JAGS_mds_nations.r: Bayesian multidimensional scaling of nations similarities data using JAGS.

Dataset: nations.Rda

JAGS model file: JAGS_mds_model.bug



smacof_indscal_2009_France.r: Individual differences multidimensional scaling of the 2009 European Election Study (French module) Left-Right issue scale data.

Dataset: french.parties.individuals.Rda



Data for Exercises:



SupremeCourt.2011.Rda: 2011 US Supreme Court

CCES2010.GA10.Rda: 2010 Cooperative Congressional Election Study (Georgia 10th Congressional District)

CCES2010.GA10.bug: JAGS model file to analyze the 2010 Cooperative Congressional Election Study (Georgia 10th Congressional District)

CHES2010.France.Rda: 2010 Chapel Hill Expert Survey (French Module)

Supplemental Links:



William G. Jacoby and David A. Armstrong II. 2014. "Bootstrap Confidence Regions for Multidimensional Scaling Solutions." American Journal of Political Science 58(1): 264-278.

JAGS (Just Another Gibbs Sampler)

rjags package for R

Book Chapters

Analyzing Spatial Models of Choice and Judgment with R
Chapter 1: Introduction
Chapter 2: The Basics of R
Chapter 3: Analyzing Issue Scales
Chapter 4: Analyzing Similarities and Dissimilarities Data
Chapter 5: Unfolding Analysis of Rank Order and Ratio Scale Data
Chapter 6: Analyzing Legislative Roll Call (Binary Choice) Data
Chapter 7: Advance Topics


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Analyzing Spatial Models of Choice and Judgment with R
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