Initialize the matrix which stores the values of c for the two
methods

eff=[0.70:0.0001:0.9999];
cc=[eff' zeros(length(eff),1)];
for i=1:length(eff)
cc(i,2)=HUeff(eff(i),1);
end
figure
plot(cc(:,1),cc(:,2),'LineStyle','-','LineWidth',2)
xlabel('Effciency')
ylabel('Value of c')