Classification tools in chemistry. Part 1: linear models. PLS-DA

The common steps to calibrate and validate classification models based on partial least squares discriminant analysis are discussed in the present tutorial. All issues to be evaluated during model training and validation are introduced and explained using a chemical dataset, composed of toxic and non-toxic sediment samples. The analysis was carried out with MATLAB routines, which are available in the ESI dagger of this tutorial, together with the dataset and a detailed list of all MATLAB instructions used for the analysis.