Dear list,

I would like to draw matrices with internal lines as can be done with LaTeX (cf pdf output) :

========================
\documentclass{article}
\begin{document}
$M =\left( \begin{array}{c|c}
A & B \\
\hline
C & D \\
\end{array} \right)$
\end{document}
========================

I didn't find out how to use mathmatrix to achieve this. My best result to date is 

========================
\starttext
$M = \left( \bTABLE[frame=off]
\bTR
	\bTD[rightframe=on, bottomframe=on] $A$ \eTD
	\bTD[bottomframe=on] $B$ \eTD
\eTR\bTR
	\bTD[rightframe=on] $C$ \eTD
	\bTD $D$ \eTD
\eTR
\eTABLE \right)$
\stoptext
========================

The code is rather ugly, and I get a spurious space at the bottom of the table.

Any hints?

Thank you,

-- 
Jean-Philippe Rey
jean-philippe.rey@centralesupelec.fr
91192 Gif-sur-Yvette Cedex - France
Empreinte PGP : 807A 5B2C 69E4 D4B5 783A 428A 1B5E E83E 261B BF51