\documentclass[a4paper]{article}

\usepackage{pgfplots}

\pgfplotsset{compat=1.3}

\begin{document}
\begin{tikzpicture}
	\begin{axis}[colorbar,title=Default]
\addplot3[contour prepared={axes={x}{y}{z}},point meta=x] table[x index=2,y index=1,z index=2] {unittest_contour_z_dir_2_contour.output.table};
	\end{axis}
\end{tikzpicture}

\begin{tikzpicture}
	\begin{axis}[colorbar,title=yzx]
	\addplot3[contour gnuplot={axes={y}{z}{x}}] {x^2-y^2};
	\end{axis}
\end{tikzpicture}
\end{document}

