/** * Returns the y-value for the specified series and item. * * @param series the series (zero-based index). * @param item the item (zero-based index). * @return The y-value for the specified series and item. */ @Override public Number getY(int series, int item) { TimePeriodValues ts = (TimePeriodValues) this.data.get(series); TimePeriodValue dp = ts.getDataItem(item); return dp.getValue(); }