%l=length(S77);
%for i=1:l
 %   S77(1,i)=S77(1,i)^10;
 %end


a=polyfit(SNR77,S77,3);
mymin=min(SNR77);
mymax=max(SNR77);
xx=linspace(mymin,mymax,100);
yy=polyval(a,xx);
plot(SNR77,S77,'o',xx,yy);
hold on


%ll=length(S7);
%for ii=1:ll
 %   S7(1,ii)=S7(1,ii)^10;
 %end
a=polyfit(SNR7,S7,3);
mymin=min(SNR7);
mymax=max(SNR7);
xx=linspace(mymin,mymax,100);
yy=polyval(a,xx);
plot(SNR7,S7,'o',xx,yy);
hold on