suggest adding some more documentation in Sessions/Session4/Part-2/Notebooks/Unmixing.ipynb

[guillepinto]

With the current documentation and hints I suffered a bit realizing the notebook, it would be nice some more help about:

• Pixel Purity Index: https://pysptools.sourceforge.io/eea.html?highlight=ppi#id6
• Fully constrained least squares (FCLS): https://pysptools.sourceforge.io/abundance_maps.html?highlight=abundance_maps#pysptools.abundance_maps.amaps.FCLS
• SPICE: https://github.com/GatorSense/SPICE
  • Params is initialized with the SPICEParameters() class.
  • inputData needs to be transposed beforehand so that it matches the input expected by SPICE().
  • The type of inputData needs to be changed to double; otherwise, the function that implements the Quadratic Programming (QP) solver using the Goldfarb/Idnani dual algorithm CRASHES.