lower_triangular_matrix.py 文件源码

def _non_diagonal_idx_array(batch_size, n):
    idx_offsets = np.arange(
        start=0, stop=batch_size * n * n, step=n * n, dtype=np.int32).reshape(
        (batch_size, 1))
    idx = np.ravel_multi_index(
        np.tril_indices(n, -1), (n, n)).reshape((1, -1)).astype(np.int32)
    return cuda.to_gpu(idx + idx_offsets)