Fig. 7: Solutions on real PXRD data using conventional NMF, stretchedNMF, and sparse-stretchedNMF.

The first row (a, b, and c) shows MgMn2O4 and the second row (d, e, and f) shows tYOCl. The blue curves are the diffraction patterns obtained for those phases by multi-phase Rietveld refinement and are used as the desired component signal. The red curves represent the extracted NMF components. Extracted signals done with conventional NMF (red curves in a and d), STRETCHEDNMF (red curves in b and e) and SPARSE-STRETCHEDNMF (red curves in c and f).