ppplot.m

该程序是二阶琐相环的防震实例 仿真结果给出了二阶琐相环的相平面

kz=0;
while kz == 0
k = menu ( 'Phase Plane Options',...
    'Extended Phase Plane',...
    'Phase plane mod(2pi)',...
    'Exit Phase Plane Menu');
if k== 1
     phierrn = phierror/pi;
     plot(phierrn,freqerror,'k')
     title('Phase Plane Plot')
     xlabel('Phase Error/Pi'); ylabel('Frequency Error- Hertz')
     grid
     pause
elseif k==2
    pplane(phierror,freqerror,nsettle+1)
    pause
elseif k==3
    kz=1;
end
end