Mathematics and Mathematics Education;
National Institute of Education;
Nanyang Technological University;
Singapore;
Natural Sciences and Science Education;
National Institute of Education;
Nanyang Technological University;
Singapore;
Feature; Selection; Attenuated; Total; Reflection; Fourier; Transform; Infrared; Spectroscopy; Penalized; Linear; Discriminant; Analysis; Principal; Component; Discriminant; Analysis; Partial; Least; Squares; Discriminant; Analysis;