Graphics, Figures & Tables ⇒ gnuplottex | New Environment for Gnuplot Script

[AahzChi]

I try to create a new environment for gnuplot, where the figure-command and captions and so on are included.

Code: Select all

\newenvironment{gnu}[1]{
  \begin{figure}[!ht] 
  \caption{#1}
  \begin{gnuplot}[terminal=epslatex,terminaloptions=color solid]
}{
  \end{gnuplot}
  \end{figure}
}


\begin{gnu}{1}
  plot cos(x)
\end{gnu}

But this is not working. It does not recognize the \end{gnuplot}. If I write it explicitly in the command, it works:

Code: Select all

\newenvironment{gnu}[1]{
  \begin{figure}[!ht] 
  \caption{#1}
  \begin{gnuplot}[terminal=epslatex,terminaloptions=color solid]
}{
  \end{figure}
}


\begin{gnu}{1}
  plot cos(x)
  \end{gnuplot}
\end{gnu}

Is there any workaround?

[Stefan Kottwitz]

Hi AahzChi,

welcome to the board!

Perhaps post a complete example, so it can be tested. Perhaps try a different syntax, \gnuplot and \endgnuplot:

Code: Select all

\newenvironment{gnu}[1]{
  \begin{figure}[!ht]
  \caption{#1}
  \gnuplot[terminal=epslatex,terminaloptions=color solid]
}{
  \endgnuplot
  \end{figure}
}

Stefan

[AahzChi]

Hi,
thanks for the reply and the welcome!
Here is the complete example:

Code: Select all

\documentclass{article}

\usepackage{graphicx}
\usepackage{epstopdf}
\usepackage{gnuplottex}

\begin{document}

\newenvironment{gnu}[1]{
  \begin{figure}[!ht] 
  \caption{#1}
  \begin{gnuplot}[terminal=epslatex,terminaloptions=color solid]
}{
  \end{gnuplot}
  \end{figure}
}

\begin{gnu}{caption}
  plot cos(x)
\end{gnu}

\end{document}

If I take \begin/\end{gnuplot} out of the newenvironment, it works.
Your suggestion with \gnuplot/\endgnuplot does not work for me.

I have heard about commands that expand an argument in a certain order. Could this be useful here?

[AahzChi]

No ideas anybody?

[Stefan Kottwitz]

How about using pgfplots? This is a very capable modern package, which works with LaTeX in dvi mode as well as with pdfLaTeX, XeLaTeX, LuaLaTeX, ConTeXt, and plain TeX, without need to call an external program such as gnuplot.

Stefan

[lechi_jb]

Hey AahzChi!

Did you find a solution for this problem?

Christian

[cgnieder]

The {gnuplot} environment is no usual environment but similar to a {verbatim} environment. It needs to grab the environment body verbatim and write it to a file which then is processed by gnuplot. The best way around is to copy the definition of the {gnuplot} environment (it is not very long) and modify it to give the wanted result:

Code: Select all

\documentclass{article}

\usepackage{graphicx}
\usepackage{epstopdf}
\usepackage{gnuplottex}

\newenvironment{gnu}[1]{%
  \def\gnufigurecaption{#1}%
  \stepcounter{fignum}%
  \def\gnuplotterminal{latex}%
  \def\gnuplotterminaloptions{}%
  \def\gnuplotscale{1}%
  \setkeys{pic}{terminal=epslatex,terminaloptions=color solid}%
  \xdef\gnuplotCutFile{\figname.gnuplot}%
  \gnuplotverbatimwrite{\gnuplotCutFile}%
}{%
  \endgnuplotverbatimwrite
  \gnuplotgraphicsprocess
  \begin{figure}[!ht]
  \centering
  \expandafter\caption\expandafter{\gnufigurecaption}%
  \gnuplotgraphicsinclude
  \end{figure}
}

\begin{document}

\begin{gnu}{this is the caption}
  plot cos(x)
\end{gnu}

\end{document}

Regards

[lechi_jb]

Thank you very much!!


It works perfekt!

Here is my code:

Code: Select all

\newenvironment{plot}[2]
{
	\stepcounter{fignum}
	\def\gnuplotterminal{latex}
	\def\gnuplotterminaloptions{}
	\def\gnuplotscale{#2}
	\def\gnuplotcaption{#1}
	\setkeys{pic}{terminal=epslatex,terminaloptions=color}
	\xdef\gnuplotCutFile{\figname.gnuplot}
	\gnuplotverbatimwrite{\gnuplotCutFile}
}
{
	\begin{figure}[htbp]
	\begin{center}
	\endgnuplotverbatimwrite
	\gnuplotgraphicsprocess
	\gnuplotgraphicsinclude
	\caption{\gnuplotcaption}
	\end{center}
	\end{figure}
}




\begin{plot}{Test2}{0.5}
	set multiplot
	set key outside;
	f(x)=sin(x);
	plot f(x);
	unset multiplot
\end{plot}

[cgnieder]

Code: Select all

{
	\begin{figure}[htbp]
	\begin{center}
	\endgnuplotverbatimwrite
	\gnuplotgraphicsprocess
	\gnuplotgraphicsinclude
	\caption{\gnuplotcaption}
	\end{center}
	\end{figure}
}

You should change this into

Code: Select all

{
	\endgnuplotverbatimwrite
	\gnuplotgraphicsprocess
	\begin{figure}[htbp]
	\centering
	\gnuplotgraphicsinclude
        \expandafter\caption\expandafter{\gnuplotcaption}
	\end{figure}
}

(1) You don't want the \begin{figure} before \endgnuplotverbatimwrite. I'm surprised this isn't giving you errors?
(2) The {center} environment adds additional vertical space which I believe is unwanted. Using \centering suffices and is what's commonly recommended.
(3) It's probably unnecessary but just to be on the safe side I would expand \gnuplotcaption once before feeding it to \caption{}.

Regards

[lechi_jb]

Ok!

I'm new on latex and so its important for me to get useful tips and tricks

So thank you again!