iFit/sw_symgetgen

 creates the generators from a list of symmetry operators

 [symOp, symTr, idx] = SW_SYMGETGEN(symOp, symTr)

 Input:

 symOp     Matrix, containing the rotational part of the symmetry
           operators, dimensions are [3 3 nSym].
 symTr     Matrix, whose columns contain the translation of every symmetry
           operator, dimensions are [3 nSym].

 Output:

 symOp, symTr
           A set of operators, that can generate all the operators of the
           input.
 isGen     Vector, that gives whether a given input operator is part of
           the generators, dimensions are [1 nSym].