def create_standard(i):
    """
create a standard matrix where all entries except the diagonal are 0, diagonals are 1
    :param i: number of rows and columns
    :return: list of lists of numerical values
    """
    output_matrix = [[0 for j in range(i)] for b in range(i)]
    for a in range(i):
        output_matrix[a][a] = 1
    return output_matrix