Transparent shapes in Matlab to TeX when using Matlab Fill

Question

I want to export figures with transparent shapes in Matlab to TeX. For the following code, the triangle will appear transparent in Matlab but will be solid blue when I generate the tex file using \input{triangle.pgf}

Matlab Code:

x = [ 1         -0.5         -0.5            1];
y = [0      0.86603     -0.86603 -2.4493e-016];

f = figure;
t = fill(x,y,'b'); 
alpha(t,0.05);

matfig2pgf('fignr',1,'filename','triangle.pgf','figwidth',14);

Answer 1

Instead of using the old matfig2pgf, try matlab2tikz. It's newer, more supported, and uses pgfplots. Replace your call to matfig2pfg with matlab2tikz('triagle.tikz'), and then use it in your LaTeX document like so:

\documentclass{article}

\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=1.4}

\begin{document}
  \input{triangle.tikz}
\end{document}