Table 6.
Correlation coefficient matrix of each feature.
| 1 | −0.23 | 0.43 | −0.55 |
|---|---|---|---|
| −0.23 | 1 | −0.27 | 0.48 |
| 0.43 | −0.27 | 1 | −0.15 |
| −0.55 | −0.48 | −0.15 | 1 |
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