Star Coordinates : A Multidimensional Visualization Technique with Uniform Treatment of Dimensions R

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Star Coordinates A Multi-dimensional
Visualization Technique with Uniform Treatment of
DimensionsRohit Kelapure David Tussedorf
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• Multi-dimensional Data
• Treats each dimension uniformly
• Follows the Info-Viz. Mantra
• Overview First
• Zoom and Filter
• Details on Demand

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• Star Co-ordinates Curvilinear Co-ordinate
  System

Name
Co-ordinate Axes on a Circle with equal Angles .
Model-Year
MPG
Data-Points Scaled to Length of axis.
Minimum Mapping Origin Maximum mapping
Other end of Axis
Cylinders
Acceleration
Displacement
Weight
Horsepower
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• Calculation of data point location for an
  8-dimensional dataset

Name- 1
Star
Cartesian
Model-Year-8
MPG - 2
d j3
d j2
d j4
ON (x,y)
O(x,y) and sequence of N Two dimensional
Vectors. An lt a1, a2, a3. an gt
d j1
d j5
Accl.-7
Cylinders -3
p
d j6
d j8
Data-element Dj
Point Pj
d j7
Displacement- 4
Weight -6
Horsepower 5
Pj Sum of all unit Vectors Ui ( uxi , uyi
)on each co-ordinate multiplied by the value of
that data element for that co-ordinate
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• Transformations
• Scaling
• Rotations
• Queries
• Applications
• Hierarchially Clustered Datasets
• Multifactor Analysis

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• Comparison