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;=========================== copyright =========================================
;                       XAID (XAfs with IDl) package.                          ;
;     Copyright European Synchrotron Radiation Facility (1993-2000).           ;
; This software may be used, copied, or redistributed as long as it is not     ;
; sold and this copyright notice is reproduced on each copy made.              ;
; The software is provided as is without any express or implied warranties     ;
; whatsoever.                                                                  ;
; Other limitations apply as described in the file README.copyright.           ;
;                                                                              ;
; REFERENCE: "XAID: A package for XAFS data analysis based on IDL"             ;
;       Manuel Sanchez del Rio. Proceedings of the 9th International           ;
;	Conference on X-ray Absorption Fine Structure                          ;
;	J. Phys. IV, Coll C2-209-210, 1997.                                    ;
;==============================================================================;


**************************************************************************
*         XAID: a package for XAFS data analysis based on IDL.           *
**************************************************************************



Definition: 'set' is an IDL variable containing an spectrum. Is the
		basic unit of comunication between IDL-EXAFS procedures
		and functions. Usually is fltarr(2,npoints) (two column
		spectrum), but occasionally can be defined as a
		multicolumn variable fltarr(ncolumns,npoints)


Main programs:
	cnpick		Main procedure for the exafs extraction

Exafs procedures and functions:
	bftr		Calculate Back Fourier Transform (Standard procedure)
	bftrset		Driver for bftr and fastbftr
	e2k		change the energy scale to wavenumber
	fastbftr	calculate the back F.T. (fast FT algorithm)
	fastftr		calculates the F.T (fast F.T. algorithm)
	ftr		calculates the  Fourier Transform (Standard procedure)
	ftrset		drivet for ftr and fastftr
	gete0		to get the edge
	getjump		to get the jump value
	k2e		transform the k scale to energy
	polspl		multipolynomial spline
	polspl_evaluate	multipolynomial spline evaluation
	postedge	a driver for polspl
	window_ftr	windows for F.T.
	writeset	writes a set into a file

"Set" management utilities:
	derivset	calculates derivatives of sets
	fitset		polynomial fitting of sets
	plotset		plots a set
	readset		puts a file into a set
	zoomset		plots and zooms a set

General I/O utilities:
	getyesornot	tool for binary inquires
	gettwoabscissas reads two values  from the graphic with cursor/typing 
	getvalue	facilitates the input of all types of data

Graphical User Interfaces:
	xaid_mu2chi	(XAFS extraction)
	xaid_ff		(XAFS Fourier Filtering)

External libraries:
	This package uses other IDL functions and procedures found in the 
	/util directory of the idl.expg distribition.


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;     Copyright European Synchrotron Radiation Facility (1993-1996).           ;
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;	J. Phys. IV France 7 (1997) Colloque C2, Suppl Jour. de Phys III (1997);
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;       Manuel Sanchez del Rio. To be published at the proceedings of          ;
;       the 9th International Conference on X-ray Absorption Fine Structure    ;
;       26th - 30th August 1996,  E S R F - Grenoble  France                   ;
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