% simulate two tank system

function yt=contro(c,y,t,my)


  rn=rand;
  pom=0;
  for f=1:my
     if (pom<rn)&(pom+c(f,y(t))>rn)
       yt=f;               
     end
     pom=pom+c(f,y(t));
  end  

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