Efficiency factor

function E = efficiencyFactor(Pd, Pfa, n)

    SNR1 = zeros(1,numel(pd));
    SNRn = zeros(1,numel(pd));

    for i=1:numel(Pd)

        %SNR for sigal pulse
        SNR1(i) = calcSNR(Pd(i),Pfa,1);
        %SNR for n signal pulses
        SNRn(i) = calcSNR(Pd(i),Pfa,n);

    end


    for i=1:numel(Pd)
        E(i) = SNR1(i)/ (n*SNRn(i));

    end

end