How to add +180 degree in phase of bode plot?

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Saunak Bhalsod 2016-11-7

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编辑： Robert 2016-11-8

I am trying to draw the bode plot of the system who have 180 degree phase shift. But It is not showning that boost. So how to add phase manually in bode plot?

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Robert 2016-11-7

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编辑：Robert 2016-11-8

在 MATLAB Online 中打开

If you generate the plot with bodeplot, you can use the phase matching feature described in the documentation. From that page:

sys = tf(1,[1 1]);
h = bodeplot(sys);
p = getoptions(h);
p.PhaseMatching = 'on';
p.PhaseMatchingFreq = 1;
p.PhaseMatchingValue = 750;
setoptions(h,p);