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1.65
RMSECV
RMSEC
1.6
1.55
1.5
1.45
1.4
1.35
1.3
1.25
1
2
3
4
5
6
7
Latent Variable Number
Fig. 1.2
RMSE and RMSECV distribution plot. The minimum RMSECV is 1.51, indicating the
optimal number of LVs is 1
20
18
R
2
= 0.918
1 Latent Variable
RMSEC = 1.4358
RMSECV = 1.5104
CV Bias = 0.013356
16
14
12
10
8
6
FeO Predicted
1:1 line
Fit line
4
2
0
5
10 15
FeO Measured (wt.%)
20
25
Fig. 1.3
Regression result of PLS modeling. The correlation coefficient is 0.918, and RMSE is
1.44, and RMSECV is 1.51
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