tbplas.cart2frac

tbplas.cart2frac(lat_vec: ndarray, cart_coord: ndarray, origin: ndarray = array([0., 0., 0.])) → ndarray

Convert Cartesian coordinates to fractional coordinates. :param lat_vec: (3, 3) float64 array

Cartesian coordinates of lattice vectors, with each ROW being a vector

Parameters:

• cart_coord – (num_coord, 3) float64 array Cartesian coordinates to convert

• origin – (3, ) float64 array Cartesian coordinate of lattice origin

Returns:

(num_coord, 3) float64 array fractional coordinates in basis of lattice vectors