The Caleydo Matchmaker: Analyzing Multidimensional Data.

The Caleydo Matchmaker, a visualization technique to analyze clustered, multidimensional data. Supplementary video for the InfoVis 2010 paper by Alexander Lex, Marc Streit, Christian Partl, Karl Kashofer, and Dieter Schmalstieg (TU Graz, Medical University of Graz).

When analyzing multidimensional, quantitative data, the comparison of two or more groups of dimensions is a common task. Typical sources of such data are experiments in biology, physics or engineering, which are conducted in different configurations and use replicates to ensure statistically significant results. One common way to analyze this data is to filter it using statistical methods and then run clustering algorithms to group similar values. The clustering results can be visualized using heat maps, which show differences between groups as changes in color. However, in cases where groups of dimensions have an a priori meaning, it is not desirable to cluster all dimensions combined, since a clustering algorithm can fragment continuous blocks of records. Furthermore, identifying relevant elements in heat maps becomes more difficult as the number of dimensions increases. To aid in such situations, we have developed Matchmaker, a visualization technique that allows researchers to arbitrarily arrange and compare multiple groups of dimensions at the same time. We create separate groups of dimensions which can be clustered individually, and place them in an arrangement of heat maps reminiscent of parallel coordinates. To identify relations, we render bundled curves and ribbons between related records in different groups. We then allow interactive drill-downs using enlarged detail views of the data, which enable in-depth comparisons of clusters between groups. To reduce visual clutter, we minimize crossings between the views.

Category:

Science & Technology

Tags:

• InfoVis 2010
• clustering
• Caleydo
• gene expression data
• omics data
• cluster algorithm comparison