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CiSE: a circular spring embedder layout algorithm.

Ugur Dogrusoz1, Mehmet E Belviranli, Alptug Dilek

  • 1Department of Computer Engineering, Bilkent University, Ankara 06800, Turkey. ugur@cs.bilkent.edu.tr

IEEE Transactions on Visualization and Computer Graphics
|April 6, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a novel algorithm for circular graph layout, optimizing cluster placement and reducing edge crossings. The method enhances drawing quality and efficiency for clustered graph visualization.

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Area of Science:

  • Computer Science
  • Graph Theory
  • Data Visualization

Background:

  • Automatic graph layout is crucial for visualizing complex data structures.
  • Existing algorithms for clustered graphs often struggle with optimizing cluster positions and minimizing edge crossings.
  • Circular layout styles offer aesthetic advantages but present unique challenges for clustered data.

Purpose of the Study:

  • To develop a new algorithm for automatic circular layout of clustered graphs.
  • To optimize the intrinsic placement and orientation of individual clusters within a modified spring embedder.
  • To reduce inter-cluster edge crossings while maintaining or improving individual cluster layouts.

Main Methods:

  • A modified spring embedder approach is used to determine optimal cluster locations and orientations.
  • Heuristics like node order reversal and pair swapping within clusters are employed to relax the system.
  • The algorithm does not require an acyclic quotient graph and utilizes inner-circle space to reduce cluster area.

Main Results:

  • The algorithm successfully reduces inter-cluster edge crossings.
  • It optimizes cluster positioning without sacrificing individual cluster layout quality.
  • Experimental results demonstrate satisfactory execution time and superior drawing quality compared to previous algorithms.
  • The algorithm is implemented in the CHISIO tool for compound and clustered graph editing.

Conclusions:

  • The presented algorithm offers an effective solution for automatic circular layout of clustered graphs.
  • It outperforms existing methods in terms of layout quality and efficiency.
  • The integration into CHISIO provides a practical tool for researchers and developers.