There's a bug in computing the default frequency range. This is a workaround.
NyquistPlot[gLT, {-3, 3}, PlotPoints -> 200, MaxRecursion -> 10]
Suba,
Thanks for the help. I was surprised that there is still such a bug in NyquistPlot. This function has been in Mathematica forever.
Anyway, thanks again for clearing up the issue. Much appreciated.
Regards,
Robert Betz
Hello, use Chop[] so that you get a similar plot
NyquistPlot[Chop[gLTTf], PlotRange -> {{-6, 1}, {-3, 3}}, AspectRatio -> Full, Exclusions -> None]
Why is dosen't work with my code ? See below:
When using Rationalize you have set the tolerance to 0. Try using a higher tolerance:
Rationalize
gLT = Rationalize[ ( 3.553*10^-15*s^4 - 0.1642*s^3 - 0.1243*s^2 - 0.00161*s + 9.121*10^-17)/( s^5 + 1.825*s^4 + 2.941*s^3 + 0.03508*s^2 + 0.01522*s - 1.245*10^-15), 10^-14];
Yes ,probably is a bug in NyquistPlot.
I tried your example in Matlab and give the same plot what you wrote earlier.
You may write to WRI and you will find out what they will say.
Regards M.I.
