Stoichiometric Coefficient

n = 0:1:15;

ar_alkane = ((3.*n) + 1)./2;
ar_alkene = (3.*n)./2;
ar_alkyne = ((3.*n) - 1)./2;

figure('Name','Stoichiometric Combustion');
hold on; box on;
set(gcf,'color','w');
plot(n,ar_alkane,'-.sb','LineWidth',1,'MarkerFaceColor','b','MarkerEdgeColor','b');
plot(n,ar_alkene,'r','LineWidth',2);
plot(n,ar_alkyne,'--m','LineWidth',2);
grid on; grid minor; xlim([1 12]);
lg=legend('Alkane','Alkene','Alkyne','Location','Northwest');
title(lg,'Fuel Type');
xlabel('Number of atoms of Carbon','FontWeight','bold');
ylabel('Stoichiometric Coefficient','FontWeight','bold');
print('Plot','-dpng','-r300');