| spData | Mid-infrared Spectra of Thirteen Types of Starch |
| spder | N-derived of a Mid-infrared Spectra |
| spint | Interpolation for Intermediate Values of a Matrix of Mid-infrared Spectra |
| spmbl | Linear Baseline Correction of a Mid-infrared Spectrum |
| spmblp | Polynomial Baseline Correction of a Matrix of Mid-infrared Spectra |
| spmws | Moving-average Smoothing Filter of a Mid-infrared Spectrum |
| spnorm01 | Normalizes the Absorbance Between 0 and 1 of a Matrix of Mid-infrared Spectra |
| spnormw | Normalizes the Absorbance of a Matrix of Mid-infrared Spectra by a Specific Band |
| spoffs | Offset Correction of a Matrix of Mid-infrared Spectra |
| sppeak | Identification of Peaks of a Mid-infrared Spectra |
| sprem | Remove Alternate Values of a Matrix of Mid-infrared Spectra |
| spsga | Savitzky-Golay Smoothing Filter of a Mid-infrared Spectrum |
| spsgb | Savitzky-Golay Smoothing Filter of a Mid-infrared Spectra |
| sptrun | Truncation of a Region of a Mid-Infrared Spectral Matrix |
| spvalley | Identification of Valleys of a Mid-infrared Spectra |