+ "\tthe translated values are not known, use missing values\n" + "\t(default is to remove those instances).", "M", 0, "-M"));
+ "\tthe translated values are not known, remove those instances\n" + "\t(default is to use missing values).", "M", 0, "-M"));
  public Enumeration listOptions() {    Vector newVector = new Vector(4);    newVector.addElement(new Option(              "\tSpecify list of columns to translate in time. First and\n"	      + "\tlast are valid indexes. (default none)",              "R", 1, "-R <index1,index2-index4,...>"));    newVector.addElement(new Option(	      "\tInvert matching sense (i.e. calculate for all non-specified columns)",              "V", 0, "-V"));    newVector.addElement(new Option(              "\tThe number of instances forward to translate values\n"	      + "\tbetween. A negative number indicates taking values from\n"	      + "\ta past instance. (default -1)",              "I", 1, "-I <num>"));    newVector.addElement(new Option(	      "\tFor instances at the beginning or end of the dataset where\n"	      + "\tthe translated values are not known, use missing values\n"	      + "\t(default is to remove those instances).",              "M", 0, "-M"));    return newVector.elements();  }