//Evaluate magnitude response of continuous-time system 'plot.2.code'
   xinit('plot.2.ps')
   hs=analpf(4,'cheb1',[.1 0],5)
   fr=0:.1:15;
   hf=freq(hs(2),hs(3),%i*fr);
   hm=abs(hf);
   plot(fr,hm),
   xend(),

