Hybrid Minimization Algorithm
While working on a full spectral fitting algorithm to simulate stellar spectra against stellar atmosphere models, we are developing the Hybrid Minimization Technique.
This makes it possible to effectively minimize the functions defined for discrete and arbitrary sets of parameters. This is especially useful for our problem since the stellar model grids are pre-computed for a fixed set of parameters. Using HMT one can avoid the necessity to interpolate the model spectra between nodes. Also, this algorithm does not require regular model grids.
We released the Hybrid Minimization algorithm as a separate IDL/GDL library which is available in the public BitBucket repository.