determines allowed tensor components in a given point group symmetry [M, asym] = SW_BASISMAT(symOp, r, tol) It determines the allowed matrix elements compatible with a given point group symmetry. The matrix can describe exchange interaction or single ion anisotropy. Input: symOp Generators of the point group symmetry, dimensions are [3 3 nSym]. Each symOp(:,:,ii) matrix defines a rotation. r Distance vector between the two interacting atoms. For anisotropy r=0, dimensions are [3 1]. tol Tolerance, optional. Default value is 1e-5. Output: M Matrices, that span out the vector space of the symmetry allowed matrices, dimensions are [3 3 nM]. Any matrix is allowed that can be expressed as a linear combination of the symmetry allowed matrices. asym Logical vector, for each 3x3 matrix in M, tells whether it is antisymmetric, dimensions are [1 nM]. See also SW.GETMATRIX, SW.SETMATRIX.

- sw_basismat determines allowed tensor components in a given point group symmetry
- sw_symorder determine the order of the symmetry operator

- sw_basismat determines allowed tensor components in a given point group symmetry

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