Run sampling method

    Parameters
    ----------
    args : argparse namespace

def cli_action(args):
    """Run sampling method

    Parameters
    ----------
    args : argparse namespace
    """
    problem = read_param_file(args.paramfile)
    param_values = sample(problem, seed=args.seed)
    np.savetxt(args.output, param_values, delimiter=args.delimiter,
               fmt='%.' + str(args.precision) + 'e')