Constrained Stress Majorization Using Diagonally Scaled Gradient Projection

  • Tim Dwyer
  • Kim Marriott
Conference paper

DOI: 10.1007/978-3-540-77537-9_23

Part of the Lecture Notes in Computer Science book series (LNCS, volume 4875)
Cite this paper as:
Dwyer T., Marriott K. (2008) Constrained Stress Majorization Using Diagonally Scaled Gradient Projection. In: Hong SH., Nishizeki T., Quan W. (eds) Graph Drawing. GD 2007. Lecture Notes in Computer Science, vol 4875. Springer, Berlin, Heidelberg

Abstract

Constrained stress majorization is a promising new technique for integrating application specific layout constraints into force-directed graph layout. We significantly improve the speed and convergence properties of the constrained stress-majorization technique for graph layout by employing a diagonal scaling of the stress function. Diagonal scaling requires the active-set quadratic programming solver used in the projection step to be extended to handle separation constraints with scaled variables, i.e. of the form siyi + gij ≤ sjyj. The changes, although relatively small, are quite subtle and explained in detail.

Keywords

constraints graph layout 

Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Tim Dwyer
    • 1
  • Kim Marriott
    • 1
  1. 1.Clayton School of Information TechnologyMonash UniversityClaytonAustralia

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