This feature allows you to modify any existing DataSet in order to
add new attributes, to correct some errors, etc.
Once the DataSet file is loaded (always in KEEL's format) by pressing the 'Browser' button its content appears
on the table. Using the table view facilitates navigation across the content
of the file. Using the table, its cells and the buttons situated over it
you can perform some operations:
- Modify the cell content: you only have to write the new value, and if it is
valid, the cell content is modified. Otherwise an error dialog is shown.
- Change the rank values: only if the attribute selected is "Integer"
or "Real" you can write the new rank values.
- Change nominal values: only if the attribute selected is nominal. Using
the buttons '+' and '-' and the list, you can add or remove the values allowed for the
attribute.
- Change attribute 'function': you can modify the attribute 'function' by specifying if it is "input"
or "output".
- Delete a row: pressing the button
, an instance is removed from DataSet.
- Delete a colum: pressing the button
, the attribute in the column
selected is removed from all the instances.
- Insert a row: you can add an instance to the DataSet. To do this, you only have to press
the button
and a new row is added to the bottom of the table. The row has
all its cells in blank.

When you have made all the changes, you can save them to a file pressing the
"Save" button.