Quantitative Classification of Quartz by Laser Induced Breakdown Spectroscopy in Conjunction with Discriminant Function Analysis
Table 4
Predicted group membership of quartz and its classification.
Predicted group membership of quartz
ID
Lapis
Crystal
Pink
Tourmaline
Amethyst
Total
Original
Count
Lapis
29
0
0
1
0
30
Crystal
0
30
0
0
0
30
Pink
0
0
30
0
0
30
Tourmaline
0
0
0
30
0
30
Amethyst
0
0
0
0
30
30
%
Lapis
96.8
0.0
0.0
3.2
0.0
100.0
Crystal
0.0
100.0
0.0
0.0
0.0
100.0
Pink
0.0
0.0
100.0
0.0
0.0
100.0
Tourmaline
0.0
0.0
0.0
100.0
0.0
100.0
Amethyst
0.0
0.0
0.0
0.0
100.0
Cross-validated
Count
Lapis
29
0
0
1
0
30
Crystal
0
30
0
0
0
30
Pink
0
0
30
0
0
30
Tourmaline
0
0
0
30
0
30
Amethyst
0
0
0
0
30
30
%
Lapis
96.8
0.0
0.0
3.2
0.0
100.0
Crystal
0.0
100.0
0.0
0.0
0.0
100.0
Pink
0.0
0.0
100.0
0.0
0.0
100.0
Tourmaline
0.0
0.0
0.0
100.0
0.0
100.0
Cross-validation is done only for those cases in the analysis. In cross-validation, each case is classified by the functions derived from all cases other than that case. 99.3% of original grouped cases correctly classified. 99.3% of cross-validated grouped cases correctly classified.
