Question

我正在参加电路课程，对于实验室我们需要用MATLAB做一些工作来绘制一些结果。我得到了以下代码，我用它来生成我们正在设计的滤波器的传递函数的波特图。我有点了解它是如何工作的，但我并不是真正了解或使用本课程以外的MATLAB。

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这很好但现在我需要绘制我在实验室测量的传递函数与SAME绘图轴上的数据。我怎样才能将它们一起绘制出来。我将实验室数据作为增益频率对列表。

Answer 1

而不是bode(H)，请尝试：

[mag,ph,w] = bode(H); % gets the data without generating the figure
plot(w, mag, 'b'); % plots only the magnitudes

freqs = data(:,1); % These 2 lines depend on how your data is formatted
gains = data(:,2); % These 2 lines depend on how your data is formatted

hold on % will add new content to the existing figure without erasing the previous content
plot(freqs, gains, 'r');
hold off

您也可以尝试（受http://www.mathworks.com/help/ident/ref/bodeplot.html启发）：

h = bodeplot(H);
setoptions(h,'FreqUnits','Hz','PhaseVisible','off'); % suppress the phase plot


freqs = data(:,1); % These 2 lines depend on how your data is formatted
gains = data(:,2); % These 2 lines depend on how your data is formatted

hold on % will add new content to the existing figure without erasing the previous content
plot(freqs, gains, 'r');
hold off

绘制测量数据以及波德图

1 个答案: