\documentclass[a4paper]{article} \usepackage[utf8]{inputenc} \usepackage{tikz} \usepackage{hyperref} \IfFileExists{pgfplots.sty}{% \usepackage{pgfplots} }{}% \IfFileExists{tikzlibraryexternal.code.tex}{% \usetikzlibrary{external} }{% \message{TEST IS RUNNING IN COMPATIBILITY MODE}% % a test to check for pgf 2.00 compatibility, to check whether the % external library copy shipped with pgfplots works: \usepgfplotslibrary{external} }% \pgfkeys{/pgf/images/include external/.code={\href{file:#1}{\pgfimage{#1}}}}