Glass Identification

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Sources:

• (a) Creator: B. German -- Central Research
  Establishment Home Office Forensic Science
  Service Aldermaston, Reading, Berkshire
  RG7 4PN
• (b) Donor: Vina Spiehler, Ph.D., DABFT
  Diagnostic Products Corporation (213)
  776-0180 (ext 3014)
• (c) Date: September, 1987 3.

Vina conducted a comparison test of her rule-based
system, BEAGLE, the nearest-neighbor algorithm,
and discriminant analysis. BEAGLE is a product
available through VRS Consulting, Inc. At the scene
of the crime, the glass left can be used as
evidence...if it is correctly identified!

Number of Attributes: 10 (including an Id#)
all attributes are continuously valued

• 1. Id number: 1 to 214
• 2. RI: refractive index
• 3. Na: Sodium (unit measurement: weight percent
  in corresponding oxide, as are attributes 4-10)
• 4. Mg: Magnesium
• 5. Al: Aluminum
• 6. Si: Silicon
• 7. K: Potassium
• 8. Ca: Calcium
• 9. Ba: Barium
• 10. Fe: Iron

Type of glass: (class attribute)

• 1 building_windows_float_processed
• 2 building_windows_non_float_processed
• 3 vehicle_windows_float_processed
• 4 vehicle_windows_non_float_processed (none in this database)
• 5 containers
• 6 tableware
• 7 headlamps

Summary Statistics:

-Attribute: Min Max Mean SD Correlation with class
2. RI: 1.5112 1.5339 1.5184 0.0030 -0.1642
3. Na: 10.73 17.38 13.4079 0.8166 0.5030
4. Mg: 0 4.49 2.6845 1.4424 -0.7447
5. Al: 0.29 3.5 1.4449 0.4993 0.5988
6. Si: 69.81 75.41 72.6509 0.7745 0.1515
7. K: 0 6.21 0.4971 0.6522 -0.0100
8. Ca: 5.43 16.19 8.9570 1.4232 0.0007
9. Ba: 0 3.15 0.1750 0.4972 0.5751
10. Fe: 0 0.51 0.0570 0.0974 -0.1879

Class Distribution: (out of 214 total instances)

• 163 Window glass (building windows and vehicle windows)
  • 87 float processed
    • 70 building windows
    • 17 vehicle windows
  • 76 non-float processed
    • 76 building windows
    • 0 vehicle windows
• 51 Non-window glass
  • 13 containers
  • 9 tableware
  • 29 headlamps

Vista visualization: 12 unseparated items(6%)

Download the dataset