Bode plot

This tikz example display two bode plots. It requires the bodegraph package and GNUPLOT.

Edit and compile if you like:

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%& -shell-escape
% Create a Bode plot using Papanicola Robert's package bodegraph:
% http://www.sciences-indus-cpge.apinc.org/Bode-Black-et-Nyquist-avec-Tikz
% Author: Dazhi Jiang
\documentclass[10pt]{article}
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\setlength\PreviewBorder{5pt}%
\usepackage{amsmath,amssymb}
\usepackage{tikz}
\usepackage{bodegraph}
\usetikzlibrary{intersections}
\usetikzlibrary{calc}
\usetikzlibrary{positioning}
\begin{document}
% Define the layers to draw the diagram
\pgfdeclarelayer{background}
\pgfdeclarelayer{foreground}
\pgfsetlayers{background,main,foreground}
\begin{preview}
\begin{tikzpicture}[>=latex',
    ref lines/.style={thin, blue!60},
    ref points/.style={circle, black, opacity=0.7, fill, minimum size= 3pt, inner sep=0},
    every node/.style={font=\small},
    bode lines/.style={very thick, blue},
    Gclabel/.style={text=blue},
    xscale=12/3]
\begin{scope}[yscale=4/110]
\UnitedB
\semilog{-1}{2}{-50}{60}
 
 
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