chemometric techniques in spectral analysis have gained importance in the quality control of  the drugs mixtures and pharmaceutical formulations containing two or more drugs with overlapping spectra. since theophylline and etophylline have common chromophore, they cannot be analyzed simultaneously using conventional uv methods. simultaneous spectrophotometric determination of etophylline and th...

In this note we introduce a method for robust principal component regression. Robust principal components are computed from the predictor variables, and they are used afterwards for estimating a response variable by performing robust linear multiple regression. The performance of the method is evaluated at a test data set from geochemistry. Then it is used for the prediction of censored values ...

Principal component regression (PCR) is a simple, but powerful and ubiquitously utilized method. Its effectiveness well established when the covariates exhibit low-rank structure. However, its ability to handle settings with noisy, missing, mixed-valued, that is, discrete continuous, not understood remains an important open challenge. As main contribution of this work, we establish robustness P...