// This macro demonstrtes how to access plot data.

   yValues = newArray(0, 0.7, 2.3, 2.8, 1, 0.5);
   Plot.create("Simple Plot", "X", "Y", yValues);
   Plot.show;
   Plot.showValues("Data");
   for (i=0; i<Table.size; i++) {
       x = Table.get("X", i);
       y = Table.get("Y", i);
       Table.set("Sum", i, x+y);
   }
   Table.update;