* @see javax.swing.table.TableModel#getValueAt(int, int)
*/
public Object getValueAt(int rowIndex, int columnIndex) {
// column: coordinate type (freq, period, power, ampl[, selected])
// row: value within the chosen coordinate's list
PeriodAnalysisCoordinateType columnType = columnTypes[columnIndex];
double val = data.get(columnType).get(rowIndex);
return NumericPrecisionPrefs.formatOther(val);
}