/** deletes the currently selected attribute */
public void deleteAttribute() {
ArffSortedTableModel model;
// no column selected?
if (m_CurrentCol == -1) return;
model = (ArffSortedTableModel) m_TableArff.getModel();
// really an attribute column?
if (model.getAttributeAt(m_CurrentCol) == null) return;
// really?
if (ComponentHelper.showMessageBox(
getParent(),
"Confirm...",
"Do you really want to delete the attribute '"
+ model.getAttributeAt(m_CurrentCol).name()
+ "'?",
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE)
!= JOptionPane.YES_OPTION) return;
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
model.deleteAttributeAt(m_CurrentCol);
setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
}
/** calculates the mean of the given numeric column */
private void calcMean() {
ArffSortedTableModel model;
int i;
double mean;
// no column selected?
if (m_CurrentCol == -1) return;
model = (ArffSortedTableModel) m_TableArff.getModel();
// not numeric?
if (!model.getAttributeAt(m_CurrentCol).isNumeric()) return;
mean = 0;
for (i = 0; i < model.getRowCount(); i++)
mean += model.getInstances().instance(i).value(m_CurrentCol - 1);
mean = mean / model.getRowCount();
// show result
ComponentHelper.showMessageBox(
getParent(),
"Mean for attribute...",
"Mean for attribute '"
+ m_TableArff.getPlainColumnName(m_CurrentCol)
+ "':\n\t"
+ Utils.doubleToString(mean, 3),
JOptionPane.OK_CANCEL_OPTION,
JOptionPane.PLAIN_MESSAGE);
}
/** sets the enabled/disabled state of the menu items */
private void setMenu() {
boolean isNumeric;
boolean hasColumns;
boolean hasRows;
boolean attSelected;
ArffSortedTableModel model;
boolean isNull;
model = (ArffSortedTableModel) m_TableArff.getModel();
isNull = (model.getInstances() == null);
hasColumns = !isNull && (model.getInstances().numAttributes() > 0);
hasRows = !isNull && (model.getInstances().numInstances() > 0);
attSelected = hasColumns && (m_CurrentCol > 0);
isNumeric = attSelected && (model.getAttributeAt(m_CurrentCol).isNumeric());
menuItemUndo.setEnabled(canUndo());
menuItemCopy.setEnabled(true);
menuItemSearch.setEnabled(true);
menuItemClearSearch.setEnabled(true);
menuItemMean.setEnabled(isNumeric);
menuItemSetAllValues.setEnabled(attSelected);
menuItemSetMissingValues.setEnabled(attSelected);
menuItemReplaceValues.setEnabled(attSelected);
menuItemRenameAttribute.setEnabled(attSelected);
menuItemDeleteAttribute.setEnabled(attSelected);
menuItemDeleteAttributes.setEnabled(attSelected);
menuItemSortInstances.setEnabled(hasRows && attSelected);
menuItemDeleteSelectedInstance.setEnabled(hasRows && m_TableArff.getSelectedRow() > -1);
menuItemDeleteAllSelectedInstances.setEnabled(
hasRows && (m_TableArff.getSelectedRows().length > 0));
}
/** renames the current attribute */
public void renameAttribute() {
ArffSortedTableModel model;
String newName;
// no column selected?
if (m_CurrentCol == -1) return;
model = (ArffSortedTableModel) m_TableArff.getModel();
// really an attribute column?
if (model.getAttributeAt(m_CurrentCol) == null) return;
newName =
ComponentHelper.showInputBox(
getParent(),
"Rename attribute...",
"Enter new Attribute name",
model.getAttributeAt(m_CurrentCol).name());
if (newName == null) return;
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
model.renameAttributeAt(m_CurrentCol, newName);
setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
}
/**
* sets the current attribute as class attribute, i.e. it moves it to the end of the attributes
*/
public void attributeAsClass() {
ArffSortedTableModel model;
// no column selected?
if (m_CurrentCol == -1) return;
model = (ArffSortedTableModel) m_TableArff.getModel();
// really an attribute column?
if (model.getAttributeAt(m_CurrentCol) == null) return;
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
model.attributeAsClassAt(m_CurrentCol);
setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
}
