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以下代码绘制了 2 个系统的频率响应。但是,图上没有显示第二阶段图。
freqz(X) hold on freqz(y) lines = findall(gcf,'type','line'); lines(1).Color = 'red' lines(2).Color = 'green' lines(3).Color = 'red' lines(4).Color = 'green'
如何将第二阶段图添加到图表上?