[NTG-context] mathmatrix and internal lines

[Otared Kavian]

Hi Jean-Philippe,

For a simple case like the one you sent, a rather not optimal solution can be this:

\definemathmatrix[mymatrix]
	[left={\left(\,},
	right={\ \right)}]
	
\starttext
\startformula
	\startmymatrix
		\NC A \hskip .5em |\hskip-.5em  \NC B \NR
		\noalign{\hrule}
		\NC C \hskip .5em |\hskip-.5em \NC D \NR
	\stopmymatrix
\stopformula
\stoptext

However I think I have seen sometime ago a more elegant solution, but I could not find it right now…

Best regards: Otared K.

> On 26 Nov 2020, at 10:19, Jean-Philippe Rey <jean-philippe.rey at centralesupelec.fr> wrote:
> 
> 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 at centralesupelec.fr
> 91192 Gif-sur-Yvette Cedex - France
> Empreinte PGP : 807A 5B2C 69E4 D4B5 783A 428A 1B5E E83E 261B BF51
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