Dimensional Anchors:

1. Dimensional Anchors: A Graphic Primitive for Multidimensional Multivariate Information Visualizations Patrick Hoffman Georges Grinstein UMass-Lowell

2. Background • Parallel Coordinates • Survey Plot • Scatter Plot (Scatter Plot Matrix) • Radviz (spring forces) • Circle Segments

7. Basic level, a DA is an Axis in a ScatterPlot • Associated with a Data Column (Dataset) • Anchorpoints (data points along the Axis)

8. Currently 9 Geometrical Parameters for a DA • P1- Size of scatterplot point • P2 - Length of perpendicular lines extending from anchorpoints,creating scatterplot points • P3 - length of lines connecting points associated with the same data point in scatter plot • P4 - length of rectangle in Survey Plot (has a threshold feature) • P5 - length of Parallel Coordinate lines • P6 - blocking factor for Parallel Coordinate lines • P7 - size of Radviz/spring plot point • P8 - length of “spring” lines extending from anchorpoints creating Radviz/spring plot point • P9 - zoom factor for the “spring” K constant

9. Currently 4 Data/Color Parameters for a DA • An associated data column for anchorpoints • An associated data column for colorizing • An associated data column for sorting (Survey Plot parameter only) • An associated color palette value (different color tables)

10. Some DA-Scatterplot Examples

13. DAs do not currently use Oblique Coordinates

20. Currently 9 Parameters For a Dimensional Anchor • P1 - Size of scatterplot point • P2 - Length of perpendicular lines extending from anchorpoints,creating scatterplot points • P3 - length of lines connecting points associated with the same data point in scatter plot • P4 - length of rectangle in Survey Plot (has a threshold feature) • P5 – length of Parallel Coordinate lines • P6 – blocking factor for Parallel Coordinate lines • P7 – size of Radviz/spring plot point • P8 – length of “spring” lines extending from anchorpoints creating Radviz/spring plot point • P9 – zoom factor for the “spring” K constant

21. Some DA-Survey plot Examples Data is sorted by some column

28. Currently 9 Parameters For a Dimensional Anchor • P1 - Size of scatterplot point • P2 - Length of perpendicular lines extending from anchorpoints,creating scatterplot points • P3 - length of lines connecting points associated with the same data point in scatter plot • P4 - length of rectangle in Survey Plot (has a threshold feature) • P5 – length of Parallel Coordinate lines • P6 – blocking factor for Parallel Coordinate lines • P7 – size of Radviz/spring plot point • P8 – length of “spring” lines extending from anchorpoints creating Radviz/spring plot point • P9 – zoom factor for the “spring” K constant

29. Some DA-Parallel Coordinate Examples

34. Currently 9 Parameters For a Dimensional Anchor • P1 - Size of scatterplot point • P2 - Length of perpendicular lines extending from anchorpoints,creating scatterplot points • P3 - length of lines connecting points associated with the same data point in scatter plot • P4 - length of rectangle in Survey Plot (has a threshold feature) • P5 – length of Parallel Coordinate lines • P6 – blocking factor for Parallel Coordinate lines • P7 – size of Radviz/spring plot point • P8 – length of “spring” lines extending from anchorpoints creating Radviz/spring plot point • P9 – zoom factor for the “spring” K constant

35. Some DA - Radviz/Spring Examples

45. There are many possible configurations (useful) of Dimensional Anchors