Copy-able Matrix/Grid

Question

I have grid-formatted data:

1 2 3
4 5 6 
7 7 9

I'd like to display this as above in a LaTeX document compiled with pdfLaTeX.

I've thought about using the TikZ Matrix library and the AMSMath Matrix library, but, in the resulting document, highlighting the data (as printed by AMSMath) and copy-pasting it into a notepad shows the following:

1
4
7
2
5
7
1
3
6
9

I'd like a nice grid-formatted result when I hit paste - how can I compile my PDF to produce such a result?

Answer 1

You suggested the answer yourself: A TikZ matrix will do just that (which is pretty awesome!):

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix}
\begin{document}
\begin{tikzpicture}
\matrix[matrix of nodes]{
1 & 2 & 3\\
4 & 5 & 6\\
7 & 8 & 9\\% <- Without this %, there would be a trailing "1" in the copied text
};
\end{tikzpicture}
\end{document}

gives

and copying and pasting from the PDF gives

1 2 3
4 5 6
7 8 9

Or, to draw the grid itself, along with the data (as described at TikZ matrix as a replacement for tabular, for example):

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix}
\begin{document}
\begin{tikzpicture}
\matrix [matrix of nodes, style={nodes={rectangle,draw,minimum width=3em}}, minimum height=1.5em, row sep=-\pgflinewidth, column sep=-\pgflinewidth]
{
1 & 2 & 3\\
4 & 5 & 6\\
7 & 8 & 9\\% <- Without this %, there would be a trailing "1" in the copied text
};
\end{tikzpicture}
\end{document}