Table 2.

Scores of WPI after three different processing.

Sample	PC1	PC2	Total Score
WPI	−1.60117	−0.53897	−1.262159301
U-WPI	−1.57496	0.24144	−1.075144408
M−WPI	−1.13757	1.16739	−0.562469565
UM-WPI	−1.56078	0.06226	−1.10362699
WPI-TGase	0.65933	−1.30815	0.189845341
U-WPI-TGase	1.05244	0.52892	0.86726646
M−WPI−TGase	2.80884	1.0002	2.225929908
UM-WPI-TGase	1.35386	−1.1531	0.720349242