Is there some intelligent way to have several tikz nodes have the same height and width? Consider the following example with output below.
I'd like every node in each row to have the same height equal to the height of the tallest node and every node in each column to have the same width equal to the width of the widest node.
In the example below each node in the third row has a different height. In the first two rows the heights are forced to be equal using \vphantom. There must be a more intelligent way to do this. Any ideas? What about the columns (they contain identical nodes, but they would not normally)?
I don't want to hard-code a minimum width+height.
Thank you!
J.
\documentclass{minimal}
\usepackage[svgnames]{xcolor}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
[every node/.style={anchor=base}]
\matrix [draw=red]
{
\node[fill=Orange] {a\vphantom{Xg}}; & \node[fill=Green] {X\vphantom{ag}}; & \node[fill=LightGreen] {\vphantom{aX}g}; \\
\node[fill=Yellow] {a\vphantom{Xg}}; & \node[fill=Cyan] {X\vphantom{ag}}; & \node[fill=Magenta] {\vphantom{aX}g}; \\
\node[fill=Purple] {a}; & \node[fill=LightBlue] {X}; & \node[fill=Aquamarine] {g}; \\
};
\end{tikzpicture}
\end{document}