% The MATLAB script that generates the probability of error versus the signal to noise ratioinitial_snr=0;final_snr=15;snr_step=0.25; 				snr_in_dB=initial_snr:snr_step:final_snr;for i=1:length(snr_in_dB),  snr=10^(snr_in_dB(i)/10);	          Pe(i)=Qfunct(sqrt(snr));	  echo off;end;echo on;semilogy(snr_in_dB,Pe);