tightbinder.utils.generate_basis_combinations

generate_basis_combinations(ndim)

Routine to generate the coefficients corresponding to linear combinations of some basis vectors. Possible coefficients for each vector are -1, 0 and 1.

Parameters:

ndim (int) – Dimension of the basis.

Return type:

ndarray

Returns:

Matrix where each row are the coefficients for a given combination of the basis vectors, i.e. [c1, c2, …] such that v = c1*basis_1 + c2*basis_2 + …