mescla.emma.endmembers

Screening candidate end-members in U-space.

Two questions decide whether a set of candidates is usable:

1. Do they bound the samples? Conservative mixtures of k+1 end-members lie inside the simplex those end-members span. Samples outside it cannot be explained by any non-negative combination – there is a source missing, or a reaction.

2. Do they belong to the same mixing system? A candidate far from the mixing subspace carries chemistry the mixtures do not.

Functions

barycentric_coordinates	Barycentric coordinates of points with respect to a simplex.
hull_fraction	Fraction of points inside the hull -- report this number in every EMMA.
in_hull	Boolean mask of which points lie inside the convex hull of vertices.
rank_candidates	Score candidate end-members for extremeness and subspace membership.
suggest_endmembers	Rank every combination of candidates by how well it bounds the samples.