  A cloud-hosted web-based software application, nmfMapping, for carrying out a
nonnegative matrix factorization of a set of powder diffraction or atomic pair
distribution function datasets is described. This app allows structure
scientists to rapidly find trends in sets of related data such as from in situ
and operando diffraction experiments. The application is easy to use and does
not require any programming expertise. It is available at the pdfitc.org
website.
