I need help to represent this image (I needed this because I must represent the bode diagram):
I know how to represent bode diagram, for example if we have the transfer function
H = tf([1 0.1 7.5],[1 0.12 9 0 0]);
bode(H,{0.1,10}))
but I have problems to represent that image. There are magnitudes and that dots and I don't know how to do that. I don't know if I can do that in MatLab or in LaTeX...
You can use the Bodegraph package I assume you want to plot this example http://fr.mathworks.com/help/control/ref/bode.html
it is necessary to set the transfer function of the form
with
\documentclass{article}
\usepackage{tikz}
\usepackage{bodegraph}
\begin{document}
\begin{tikzpicture}[xscale=15/4]
\begin{scope}[yscale=3/60]
\UnitedB
\semilog{-1}{2}{-60}{60}
\BodeGraph[thick,samples=500]{-1:2}
{-\SOAmp{7.5}{0.0182}{2.73}+
\SOAmp{9}{0.02}{3}+
2*\IntAmp{1}
}
\end{scope}
\begin{scope}[yshift=-4cm,yscale=3/90]
\UniteDegre
\OrdBode{15}
\semilog{-1}{2}{-180}{0}
\BodeGraph[thick,samples=500]{-1:2}
{-\SOArg{7.5}{0.0182}{2.73}+
\SOArg{9}{0.02}{3}+
2*\IntArg{1}
}
\end{scope}
\end{tikzpicture}
\end{document}
with a zoom
\documentclass{article}
\usepackage{tikz}
\usepackage{bodegraph}
\begin{document}
\begin{tikzpicture}[xscale=15/1]
\begin{scope}[yscale=3/60]
\UnitedB
\semilog{-0}{1}{-60}{60}
\BodeGraph[thick,samples=500]{0:1}
{-\SOAmp{7.5}{0.0182}{2.73}+
\SOAmp{9}{0.02}{3}+
2*\IntAmp{1}
}
\end{scope}
\begin{scope}[yshift=-4cm,yscale=3/90]
\UniteDegre
\OrdBode{15}
\semilog{-0}{1}{-180}{0}
\BodeGraph[thick,samples=500]{0:1}
{-\SOArg{7.5}{0.0182}{2.73}+
\SOArg{9}{0.02}{3}+
2*\IntArg{1}
}
\end{scope}
\end{tikzpicture}
\end{document}
more info : Plot a transfer function in latex
