MATLAB Answers

Matlab strikes again with missing functionality for bode plots

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Robert
Robert on 22 Oct 2016
Commented: Walter Roberson on 23 Oct 2016
Per usual I'm spending my weekends fighting with software that has the functionality of a ti89
I would like to have a sliding cursor on a bode plot so that i may locate a point at 180 degrees on the phase plot and have it go on the frequency plot also to define a gain margin. I have yet to be able to do this. So I'm assuming yet again matlab can't do this. I mean why would they? Every other single piece of simulation software on the planet allows you to at a minimum put a cursor on a set x or y point and find the value. We can't even do that math works? Your also going to tell me that for thousands and thousands of dollars the simulink data inspector has no functionality to make a bode plot? At least the data inspector has a sliding cursor. This is pretty sad considering what matlab costs

Answers (2)

Chaya N
Chaya N on 22 Oct 2016
Edited: Image Analyst on 22 Oct 2016
Try out the colorful buttons on the top toolbar of your figure window.
Click on the button shown by the big red box. This will bring up a + shaped cursor when you hover over the data line (the blue line, in this case). Click along the line to get a data point and its x,y values.
  9 Comments
Walter Roberson
Walter Roberson on 23 Oct 2016
and per usual you are a day late and dollar short to the party
Robert, an excellent way to avoid the problem of the response here being slower than you think is appropriate, is for you to step in and answer questions at the rapidity which you consider questions should be answered.
There are over 60000 unanswered questions, and new questions arrive at a rate of 100 to 270 per day, so we could use the assistance. I find that I can only get through 10 to 30 new answers a day (some of them take many hours of research; sometimes I have other things going on), so there plenty for everyone who cares to contribute.

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