import org.achartengine.util.XYEntry; //导入依赖的package包/类
/**
 * Removes an existing value from the series.
 * 
 * @param index the index in the series of the value to remove
 */
public synchronized void remove(int index) {
  XYEntry<Double, Double> removedEntry = mXY.removeByIndex(index);
  double removedX = removedEntry.getKey();
  double removedY = removedEntry.getValue();
  if (removedX == mMinX || removedX == mMaxX || removedY == mMinY || removedY == mMaxY) {
    initRange();
  }
}