NAME:
    sint
 PURPOSE: (one line)
    Sinc interpolation of a 1-D vector of data.
 DESCRIPTION:

 CATEGORY:
    Numerical
 CALLING SEQUENCE:
    result = sint( x, f )
 INPUTS:
    x  : Independent variable values for which f is to be interpolated.
         Note: The implied independent variable values for f are the indicies
         of the vector f.
    f  : Vector of function values (dependent variable).

 OPTIONAL INPUT PARAMETERS:

 KEYWORD PARAMETERS:

 OUTPUTS:
    Interpolated value(s).
 COMMON BLOCKS:

 SIDE EFFECTS:

  WARNING!!!  The output type of the function is derived from the rank,
      size, and type of the "x" input vector.  It is NOT controlled in any
      way by the type of "f".

 RESTRICTIONS:

 PROCEDURE:

 MODIFICATION HISTORY:
    Written by Doug Loucks, Lowell Observatory, September, 1993.
    Adapted from the IDL function sshift.pro written by Marc Buie.
    01/14/94, DWL, Documentation update.