+ "   0.1, 0.1, 0.1, -0.2, -0.2\n\n"
+ "   0.1, 0.1, -0.2, 0.2\n\n"
  public String globalInfo() {    return "This instance filter takes a range of N numeric attributes and replaces "      + "them with N-1 numeric attributes, the values of which are the difference "      + "between consecutive attribute values from the original instance. eg: \n\n"      + "Original attribute values\n\n"      + "   0.1, 0.2, 0.3, 0.1, 0.3\n\n"      + "New attribute values\n\n"      + "   0.1, 0.1, 0.1, -0.2, -0.2\n\n"      + "The range of attributes used is taken in numeric order. That is, a range "      + "spec of 7-11,3-5 will use the attribute ordering 3,4,5,7,8,9,10,11 for the "      + "differences, NOT 7,8,9,10,11,3,4,5.";  }