Exercise 17.1.6. Load the weather.nominal dataset. Use the filter weka.
unsupervised.instance.RemoveWithValues to remove all instances in which the
humidity attribute has the value high. To do this, first make the field next to
the Choose button show the text RemoveWithValues. Then click on it to get the
Generic Object Editor window, and figure out how to change the filter settings
appropriately.
Exercise 17.1.7. Undo the change to the dataset that you just performed, and
verify that the data has reverted to its original state.