pyriemann_qiskit.utils.math.to_xyz¶ pyriemann_qiskit.utils.math.to_xyz(X)[source]¶ Plot histogram of bi-class predictions. Parameters: X (ndarray, shape (n_matrices, 2, 2)) – Array of SPD matrices of size 2 x 2. Returns: points – Cartesian representation in 3d. Return type: ndarray, shape (n_matrices, 3) Notes Added in version 0.2.0.