Table 12 The gray correlation coefficient \(\xi_{ij}^{ + }\) from the alternative to the PIS.
\(\xi_{ij}^{ + }\) | C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 |
|---|---|---|---|---|---|---|---|---|---|
A1 | 0.3945 | 0.9156 | 1.000 | 0.7173 | 1.000 | 0.9183 | 1.000 | 0.3941 | 0.3722 |
A2 | 0.3810 | 0.6232 | 1.000 | 1.000 | 0.8638 | 0.634 | 0.7614 | 0.3655 | 0.3333 |
A3 | 1.000 | 0.4468 | 0.5805 | 0.4040 | 0.8638 | 0.4599 | 0.5202 | 1.000 | 1.000 |
A4 | 0.8145 | 1.000 | 0.5590 | 0.4837 | 0.4576 | 1.000 | 0.6116 | 0.5809 | 0.6344 |
