memory
integer, 1 .. 1000 default=100  | 
 memory maximum number of (x,y) pairs drawn in the graph.  | 
  add
doesn't return a value  | 
 add function add(float x_coordinate, float y_coordinate)add (x,y) values for the next graph point  | 
  clear
doesn't return a value  | 
 clear function clear() | 
  new
returns DynaChart2D  | 
 create new DynaChart2D function new() | 
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