matlab2tikzext(path,filename,width,height) exports a figure/plot by using
Nico Schlömer's matlab2tikz (File ID: #22022) to Latex/tikz.

Right before it checks by using Suresh Joel's md5 (File ID: #3432)
if the figure/plot-file has changed. If using tiksexternalize in Latex only
then a new plot will be compiled.

Many thanks to Nico Schlömer and Suresh Joel!

Inputs:

path: (String) e.g. '../latex/'
filename: (String) e.g. 'sine.tikz'
width: (Real) e.g. 6
height: (Real) e.g. 2.57

A simple example:

Matlab:

x = 0:.1:2*pi;
y = sin(x);
plot(x,y);
axis tight;
matlab2tikzext('../latex/','sine.tikz', 6, 2.57);

Latex:

\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.9}
\usepgfplotslibrary{external}
\tikzexternalize[prefix=TikzPictures/]

\begin{document}

\begin{figure}
\centering
\input{sine.tikz}
\caption{Sine}
\end{figure}

\end{document}

Needs:

- matlab2tikz (File ID: #22022),
- md5 (File ID: #3432).