Human Language Technology Center of Excellence
Department of Applied Mathematics and Statistics
Center for Imaging Science
Johns Hopkins University
and
Department of Statistics
Indiana University
V. Lyzinski, Y. Park, C.E. Priebe, M.W. Trosset, “Fast Embedding for JOFC Using the Raw Stress Criterion,” Journal of Computational and Graphical Statistics, in revision, 2017.
The Joint Optimization of Fidelity and Commensurability (JOFC) manifold matching methodology embeds an omnibus dissimilarity matrix consisting of multiple dissimilarities on the same set of objects. One approach to this embedding optimizes the preservation of fidelity to each individual dissimilarity matrix together with commensurability of each given observation across modalities via iterative majorization of a raw stress error criterion by successive Guttman transforms. In this paper, we exploit the special structure inherent to JOFC to exactly and efficiently compute the successive Guttman transforms, and as a result we are able to greatly speed up the JOFC procedure for both in-sample and out-of-sample embedding. We demonstrate the scalability of our implementation on both real and simulated data examples.
To run the experiemnts in the paper, please follow these steps:
source("packagesatstart_JCGS.R")
# Fig 1
source("fJOFC_Fig1Table2.R")
# Fig 2
source("fJOFC_Fig2.R")
# Figs 3 & 4
source("fJOFC_Figure3and4.R")
# Figs 5, 6, & 7
source("Wiki_experiment.R")
# Figs 8, 9, & 10
source("Zebrafish_Brain_Experiment.R")Here are the results after running each code:
R files:
prepared by [email protected] on Tue Mar 7 16:46:35 2017