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

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?

Answer 1

[Robert]

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);

[Saunak Bhalsod]

I have already tried this h = bodeplot(tf_overall); p = getoptions(h); p.PhaseMatching = 'on'; p.PhaseMatchingFreq = 1; p.PhaseMatchingValue = 270; setoptions(h,p); but there is no change.

[Saunak Bhalsod]

[Saunak Bhalsod]

</matlabcentral/answers/uploaded_files/62756/cap1.PNG> There is no change