Plot arrays plus intersections.

With this i'm actually plotting three different arrays (Tpf, pfo and Tpp)

Example:

Tpf = [0 1 2 3 4 5] Tpp = [5 9 12 15 18 23] pfo = [0.1 0.2 0.3 0.4 0.5 0.6]

I want to plot pfo/Tpp intersection in the same plot, so it shows the values of pfo and Tpp on the intersection.

 [AX,H1,H2] = plotyy(time,Tpf,time,pfo);
  title('Proceso de Esterilización');
  xlabel('Tiempo [s]');
  set(get(AX(1),'ylabel'),'String','Temperatura [°C]') 
  set(get(AX(2),'ylabel'),'String','Grado de Esterilización [s]') 
  set(H1,'Color','blue','LineWidth',2);
  set(H2,'Color','green','LineWidth',2);
  hold all;
  H3 = plot(time,Tpp);
  set(H3,'Color','red','LineWidth',2);

Best Regards