/** Refresh the coordinates x[][] is the wrapped coordinates `n' may be less than x.length */
public void refresh(double x[][], int n, boolean center, boolean adjScale) {
if (model == null) {
model = new XYZModel();
adjScale = true;
}
model.updateXYZ(x, n, center);
if (adjScale) realSpan = model.getSpan(x, n);
repaint();
}
