I can’t recommend  LMFIT in python enough  (or Larch - never used it mind, but see no reason why I haven’t).

Its well documented, easy to use and, best of all, its FREE!  :)


https://lmfit.github.io/lmfit-py/builtin_models.html#builtin-models-chapter
https://lmfit.github.io/lmfit-py/builtin_models.html#example-3-fitting-multiple-peaks-and-using-prefixes


all the best

Jon



On 19 Jul 2016, at 14:26, Robert Gordon <ragordon@alumni.sfu.ca> wrote:

Hi Matthew,

WinXAS, (Commercial program by Thorsten Ressler) does possess the capabilities you are seeking
but it costs E$200 for an academic/gov't license.

-R.



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