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Table 2 Calibration and cross-validation statistics of digestible energy (DE) and metabolizable energy (ME) of corn fed to growing pigs (MJ/kg, dry matter basis)

From: Use of near-infrared reflectance spectroscopy for the rapid determination of the digestible energy and metabolizable energy content of corn fed to growing pigs

     Calibration Cross-validation
Items Derivative Scatter Factors n Mean SDa SECb RSQcal c SECVd R2 CV e RPDcv f
DED g 2,12,12,1 SNVD 13 86 16.41 0.759 0.196 0.89 0.266 0.87 2.85
MED g 2,10,10,1 SNVD 11 85 15.98 0.741 0.206 0.87 0.267 0.86 2.78
DEC h 2,10,10,1 SNVD 12 87 16.46 0.728 0.201 0.88 0.273 0.85 2.67
MEC h 2,8,8,1 SNVD 10 86 16.20 0.711 0.215 0.86 0.280 0.84 2.54
  1. aStandard deviation
  2. bStandard error of calibration
  3. cCoefficient of determination for calibration
  4. dStandard error of cross-validation
  5. eCoefficient of determination for cross-validation
  6. fRPDCV = SD/SECV
  7. gDED and MED values determined by digestion-metabolism experiments using growing pigs
  8. hDEC and MEC values calculated according to the equations of Noblet and Perez [6]