Table 3 Statistical parameters of core modeling for independent drilling.

From: Coal seam in-situ inorganic analysis based on least angle regression and competitive adaptive reweighted sampling algorithm by XRF–visNIR fusion

Metal

Feature selection algorithms

R2

RMSEP (%)

RPD

Metal

Feature selection algorithms

R2

RMSEP (%)

RPD

Si

CARS

0.857

3.321

2.031

Ca

CARS

0.612

1.279

1.380

LAR-CARS

0.851

2.662

2.392

LAR-CARS

0.724

1.158

1.533

Al

CARS

0.828

1.542

1.970

Fe

CARS

0.914

0.752

2.234

LAR-CARS

0.798

1.355

2.080

LAR-CARS

0.931

0.688

2.426

K

CARS

0.627

0.428

1.352

Ti

CARS

0.690

0.230

1.548

LAR-CARS

0.634

0.350

1.486

LAR-CARS

0.737

0.218

1.608

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