/** 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));
}
/** sets the relation name */
private void createName() {
ArffSortedTableModel model;
model = (ArffSortedTableModel) m_TableArff.getModel();
if ((model != null) && (model.getInstances() != null))
m_LabelName.setText("Relation: " + model.getInstances().relationName());
else m_LabelName.setText("");
}
/** 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);
}