
def get_argparser_log_part(parser):
    parser.add_argument("--log",
                        dest="LOG",
                        help="To apply a log2 transformation log2(x + C) " +
                             "(see -c) ).",
                        action='store_true')

    parser.add_argument("-c",
                        dest="C",
                        help="Constant value used during log " +
                             "transformation, log2(x+C) (Default: C=1).",
                        type=float,
                        default=1.0)

    parser.set_defaults(LOG=False)
