function gau = gaussian(n, dt, nu)
total=dt*(n-1);
tover2=total/2.0;
t=-tover2:dt:tover2;
range=size(t,2);
for i=1:range
         y(i)=exp(-(pi^2)*(nu^2)*(t(i)^2));
         gau(i) = nu*y(i);
end
