function plotfilterspecs(ftrue,Hideal,deltavec,fsamp)
fsover2 = fsamp/2;
f = [ 0 ftrue fsover2 ];
for i = 2:2:length(f)
   io2 = i/2; a = Hideal(io2); d = deltavec(io2);
   apd = a+d; amd = a-d; ff = [f(i-1) f(i)];
   plot(ff,[a a],'-o',ff,[apd apd],'r--',ff,[amd amd],'r--')
   if i==2; hold on; end
end
grid on
hold off