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After some configuration nightmare i've managed to print out GNU Octave plots (via gnuplot) to tikz-pgf and display it in my LyX document..

%& -shell-escape -enable-write18

\documentclass{article}

\usepackage{tikz}
\usepackage{gnuplot-lua-tikz}
\usetikzlibrary{shapes,arrows}

\begin{document}

\begin{tikzpicture}[gnuplot, scale = 1]

%% generated with GNUPLOT 4.6p0 (Lua 5.1; terminal rev. 99, script rev. 100)
%% Sun Jun 10 03:14:21 2012
\path (0.000,0.000) rectangle (8.000,6.000);
\gpcolor{color=gp lt color border}
\gpsetlinetype{gp lt border}
\gpsetlinewidth{0.50}
\draw[gp path] (1.012,0.985)--(1.263,0.985);
\draw[gp path] (7.447,0.985)--(7.196,0.985);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node right,font={\fontsize{10pt}{12pt}\selectfont}] at (0.828,0.985) {0};
\gpcolor{color=gp lt color border}
\draw[gp path] (1.012,1.759)--(1.263,1.759);
\draw[gp path] (7.447,1.759)--(7.196,1.759);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node right,font={\fontsize{10pt}{12pt}\selectfont}] at (0.828,1.759) {0.5};
\gpcolor{color=gp lt color border}
\draw[gp path] (1.012,2.534)--(1.263,2.534);
\draw[gp path] (7.447,2.534)--(7.196,2.534);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node right,font={\fontsize{10pt}{12pt}\selectfont}] at (0.828,2.534) {1};
\gpcolor{color=gp lt color border}
\draw[gp path] (1.012,3.308)--(1.263,3.308);
\draw[gp path] (7.447,3.308)--(7.196,3.308);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node right,font={\fontsize{10pt}{12pt}\selectfont}] at (0.828,3.308) {1.5};
\gpcolor{color=gp lt color border}
\draw[gp path] (1.012,4.082)--(1.263,4.082);
\draw[gp path] (7.447,4.082)--(7.196,4.082);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node right,font={\fontsize{10pt}{12pt}\selectfont}] at (0.828,4.082) {2};
\gpcolor{color=gp lt color border}
\draw[gp path] (1.012,4.857)--(1.263,4.857);
\draw[gp path] (7.447,4.857)--(7.196,4.857);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node right,font={\fontsize{10pt}{12pt}\selectfont}] at (0.828,4.857) {2.5};
\gpcolor{color=gp lt color border}
\draw[gp path] (1.012,5.631)--(1.263,5.631);
\draw[gp path] (7.447,5.631)--(7.196,5.631);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node right,font={\fontsize{10pt}{12pt}\selectfont}] at (0.828,5.631) {3};
\gpcolor{color=gp lt color border}
\draw[gp path] (1.012,0.985)--(1.012,1.236);
\draw[gp path] (1.012,5.631)--(1.012,5.380);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node center,font={\fontsize{10pt}{12pt}\selectfont}] at (1.012,0.677) {0};
\gpcolor{color=gp lt color border}
\draw[gp path] (2.085,0.985)--(2.085,1.236);
\draw[gp path] (2.085,5.631)--(2.085,5.380);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node center,font={\fontsize{10pt}{12pt}\selectfont}] at (2.085,0.677) {0.5};
\gpcolor{color=gp lt color border}
\draw[gp path] (3.157,0.985)--(3.157,1.236);
\draw[gp path] (3.157,5.631)--(3.157,5.380);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node center,font={\fontsize{10pt}{12pt}\selectfont}] at (3.157,0.677) {1};
\gpcolor{color=gp lt color border}
\draw[gp path] (4.230,0.985)--(4.230,1.236);
\draw[gp path] (4.230,5.631)--(4.230,5.380);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node center,font={\fontsize{10pt}{12pt}\selectfont}] at (4.230,0.677) {1.5};
\gpcolor{color=gp lt color border}
\draw[gp path] (5.302,0.985)--(5.302,1.236);
\draw[gp path] (5.302,5.631)--(5.302,5.380);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node center,font={\fontsize{10pt}{12pt}\selectfont}] at (5.302,0.677) {2};
\gpcolor{color=gp lt color border}
\draw[gp path] (6.375,0.985)--(6.375,1.236);
\draw[gp path] (6.375,5.631)--(6.375,5.380);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node center,font={\fontsize{10pt}{12pt}\selectfont}] at (6.375,0.677) {2.5};
\gpcolor{color=gp lt color border}
\draw[gp path] (7.447,0.985)--(7.447,1.236);
\draw[gp path] (7.447,5.631)--(7.447,5.380);
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node center,font={\fontsize{10pt}{12pt}\selectfont}] at (7.447,0.677) {3};
\gpcolor{color=gp lt color border}
\draw[gp path] (1.012,5.631)--(1.012,0.985)--(7.447,0.985)--(7.447,5.631)--cycle;
\gpcolor{rgb color={0.000,0.000,0.000}}
\node[gp node center,font={\fontsize{12pt}{12pt}\selectfont}] at (4.229,0.215) {$\partial$};
\gpcolor{rgb color={0.000,0.000,1.000}}
\gpsetlinetype{gp lt plot 0}
\draw[gp path] (1.012,0.985)--(1.227,1.140)--(1.441,1.295)--(1.656,1.450)--(1.870,1.604)%
  --(2.085,1.759)--(2.299,1.914)--(2.514,2.069)--(2.728,2.224)--(2.943,2.379)--(3.157,2.534)%
  --(3.372,2.689)--(3.586,2.843)--(3.801,2.998)--(4.015,3.153)--(4.230,3.308)--(4.444,3.463)%
  --(4.659,3.618)--(4.873,3.773)--(5.088,3.927)--(5.302,4.082)--(5.517,4.237)--(5.731,4.392)%
  --(5.946,4.547)--(6.160,4.702)--(6.375,4.857)--(6.589,5.012)--(6.804,5.166)--(7.018,5.321)%
  --(7.233,5.476)--(7.447,5.631);
%% coordinates of the plot area
\gpdefrectangularnode{gp plot 1}{\pgfpoint{1.012cm}{0.985cm}}{\pgfpoint{7.447cm}{5.631cm}}
\end{tikzpicture}
%% gnuplot variables


\end{document}

enter image description here

Now I have two questions:

  • How to scale the whole image, such that it's width matches my LyX text width?
  • How to set the figure's font size in terms of multiples of the LyX text font size?

Help is much appreciated.

share|improve this question
    
I cant't compile your example. I can't find the package gnuplot-lua-tikz... –  Paul Gaborit Jun 11 '12 at 0:47
    
@PaulGaborit: I found this when googling "This is the style file for the gnuplot PGF/TikZ terminal. %%. %% It is associated with the 'gnuplot.lua' script, and usually generated. %% automatically." thus I assume that it is a generated file by some gnuplot tool –  ted Jul 3 '13 at 9:23
    
It seems you're doing extra work for inserting gnuplot in your document. Have you taken a look at pgfplots? –  juliohm Jul 3 '13 at 11:29
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2 Answers

you can try this

\documentclass{article}

\usepackage{tikz}
\usepackage{lipsum}

\begin{document}

\lipsum[1]
\noindent\begin{tikzpicture}[ xscale = \textwidth/8cm]
\path[draw] (0.000,0.000) rectangle (8.000,6.000);

\end{tikzpicture}

\lipsum[1]

\end{document}

enter image description here

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There are packages that might help you. A package I recently found and like for scaling is adjustbox since it allows also for things like a maximum width, only scaling when the image is to large for instance. However to maintain fontsizes while scaling I sugest using tikzscale.

There are some limitations regarding the fitting library but you might want to give it a try.

using rpapas example this would look like this:

\documentclass{article}

\usepackage{tikz}
\usepackage{lipsum}
\usepackage{tikzscale}
\begin{document}

\lipsum[1]
\noindent\resizebox{\linewidth}{!}{\input{linewidth.tikz}}

\lipsum[1]

\end{document}

linewidth.tikz

\begin{tikzpicture}
\path[draw] (0,0) rectangle (8,6);
\node at (4,3){cheese};    
\end{tikzpicture}

One disadvantage of this is that (afaik) the tikz pictures have to be in external files and have to have the extension .tikz, however you do not need to know the boundingbox of your picture.

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