NyquistGridLines
✖
NyquistGridLines
is an option to NyquistPlot that specifies contours of constant magnitude and phase of a closed-loop system.
Details

- The following settings can be given:
-
None no contours drawn Automatic contours chosen automatically {magnitude,phase} contours specified by magnitude and phase are drawn - magnitude values are the absolute values.
- phase values are given in radians.
- The following settings can be given for magnitude and phase:
-
None no contours drawn Automatic contours chosen automatically {c1,c2,…} draw the contours ci {{c1,style1,r1},…} contours with specified styles and regions - The default setting for stylei is Dashed for magnitude contours and Dotted for phase contours.
- The setting
specifies that a point should be included if
yields True.
- The default value of
is True&.
Examples
open allclose allBasic Examples (1)Summary of the most common use cases
Scope (9)Survey of the scope of standard use cases
Choose contours automatically:

https://wolfram.com/xid/0do8verxjcz1hoppk-9pigg6

Show the specified magnitude and phase contours:

https://wolfram.com/xid/0do8verxjcz1hoppk-q5gjq1


https://wolfram.com/xid/0do8verxjcz1hoppk-7hxxzm


https://wolfram.com/xid/0do8verxjcz1hoppk-o78srv

Specify contours with magnitude -12 dB, -13 dB, -15 dB, and -18 dB:

https://wolfram.com/xid/0do8verxjcz1hoppk-bgq12s

Specify contours with phase from -60 to 60 degrees in increments of 10:

https://wolfram.com/xid/0do8verxjcz1hoppk-1estj5

The contours depend on the feedback type:

https://wolfram.com/xid/0do8verxjcz1hoppk-m6pu35

The contours are shown only in the finite regions:

https://wolfram.com/xid/0do8verxjcz1hoppk-wgjdlp


https://wolfram.com/xid/0do8verxjcz1hoppk-53nj4z

Wolfram Research (2010), NyquistGridLines, Wolfram Language function, https://reference.wolfram.com/language/ref/NyquistGridLines.html.
Text
Wolfram Research (2010), NyquistGridLines, Wolfram Language function, https://reference.wolfram.com/language/ref/NyquistGridLines.html.
Wolfram Research (2010), NyquistGridLines, Wolfram Language function, https://reference.wolfram.com/language/ref/NyquistGridLines.html.
CMS
Wolfram Language. 2010. "NyquistGridLines." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NyquistGridLines.html.
Wolfram Language. 2010. "NyquistGridLines." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NyquistGridLines.html.
APA
Wolfram Language. (2010). NyquistGridLines. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NyquistGridLines.html
Wolfram Language. (2010). NyquistGridLines. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NyquistGridLines.html
BibTeX
@misc{reference.wolfram_2025_nyquistgridlines, author="Wolfram Research", title="{NyquistGridLines}", year="2010", howpublished="\url{https://reference.wolfram.com/language/ref/NyquistGridLines.html}", note=[Accessed: 04-April-2025
]}
BibLaTeX
@online{reference.wolfram_2025_nyquistgridlines, organization={Wolfram Research}, title={NyquistGridLines}, year={2010}, url={https://reference.wolfram.com/language/ref/NyquistGridLines.html}, note=[Accessed: 04-April-2025
]}