MATLAB: Plots Stacking when it is unwanted.

figureguiplot

When I run my program it works perfectly except when you run it a second time. It stores the last plot saved and then plots the new one created. I want it to erase the old one and only plot the new one. Also I am plot two lines at once. One is the original position of the line and does not move, the other is a moving line. Here is the code:
   plot(x,y,'--r','LineWidth',3);                      % This is the original    position of the Beam 
  hold on                                           % Holds only the axes values                                         
  plot(Beam.x,Beam.y,'b','LineWidth',2);              % The New position of Beam
  xlabel('Beam Length (in.)','Color','g');
  ylabel(bstr,'Color','g');
  ylim([-max(Beam.y(20)) max(Beam.y)]);
  legend('Without Deflection','With Deflection','Location','SouthWest');
  title(astr,'Color','y','fontweight','b');
  set(S.ax,'YDir','reverse');
  set(S.ax,'XGrid','on');
  set(S.ax,'YGrid','on');

Best Answer

Your description of the problem is not clear. Do you want to put a:
hold off
as the last line of this section of code?
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