hold off
subplot(2,2,1)
semilogy(G(:,2),G(:,3),'k:')
hold on
semilogy(G(:,2),G(:,4),'k-.')
semilogy(G(:,2),G(:,5),'k-')
% semilogy(G(:,2),G(:,6),'k--')
xlabel 'SNR (dB)'
ylabel 'BER'
title 'REPLACE THIS TITLE'

axis([0 20 1e-3 1e0]);

xlabel 'SNR (dB)'
ylabel 'BER'

x = 1;
y = 0.5e-2;

text(x,y, ['.......  deterministic'; ...
           '-.-.-. Gaussian       '; ...
           '\_\_\_\_ known channel']);

%           '---- direct ML          '; ...
