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sol=ode45(@odefun,t,y,options);
RESULT_X = sol.x;
RESULT_Y = sol.y;
%disp(sol.x)
%disp(sol.y)
%sum(sol.y,1)
ti=linspace(time(1),time(2),101);
yi=deval(sol,ti);
plot(ti,yi(25)*1000,'-b');
xlabel('time(S)');
ylabel('y(molmol)');
legend('Ethylene');
yie20=sol.y(12)*280;
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