comprehensive XAS data analysis system using Feff and Ifeffit or Larch

 Demeter provides an object oriented interface to the EXAFS data analysis
 capabilities of the popular and powerful Ifeffit package and its successor
 Larch. Given that the Ifeffit and Larch APIs involve streams of text
 commands, this package is, at heart, a code generator. Many methods of this
 package return text. All actual interaction with Ifeffit or Larch is handled
 through a single method, dispose, which is described below. The internal
 structure of this package involves accumulating text in a scalar variable
 through successive calls to the various code generating methods. This text is
 then disposed to Ifeffit, to Larch, to a file, or elsewhere. The outward
 looking methods organize all of the complicated interactions of your data
 with Ifeffit or Larch.
 .
 This package is aimed at many targets. It can be the back-end of a graphical
 data analysis program, providing the glue between the on-screen
 representation of the fit and the actual command executed by Ifeffit or
 Larch. It can be used for one-off data analysis chores -- indeed most of the
 examples that come with the package can be reworked into useful one-off
 scripts. It can also be the back-end to sophisticated data analysis chores
 such as high-throughout data processing and analysis or complex physical
 modeling.