Thanks Jeong, I was aware of this. While there is no solution that adds vertical lines into matrices, one can juxtapose two (or more) of them with properly chosen delimiters, like so: \definemathmatrix [bvmatrix] [left={\left(\,},right={\ \right\vert}] \definemathmatrix [rbmatrix] [left={\left.\,},right={\,\right)}] \starttext \startformula \startbvmatrix \NC 0 \NC 0\NC 0 \NR \NC 1 \NC 0\NC 1 \NR \stopbvmatrix \startrbmatrix \NC 0 \NR \NC 1 \NR \stoprbmatrix \stopformula \stoptext

On May 4, 2020, at 04:25, Jeong Dal wrote:

Dear Weber Mattias,

Please see page 10 of “mathalign.pdf” made by Aditya. He showed the way of writing aligned math including matrices. For example,

\startformula

\startmatrix[left={\left(\,},right={\,\right)}]

\NC 1 \NC 0 \NC 0 \NR \NC 0 \NC 1 \NC 0 \NR \NC 0 \NC 0 \NC 1 \NR

\stopmatrix \stopformula There are many other examples that you can use.

Best regards, Dalyoung

...

Message: 2 Date: Sun, 3 May 2020 17:47:24 +0000 From: "Weber, Matthias" To: mailing list for ConTeXt users Subject: [NTG-context] Vertical lines in matrices Message-ID: Content-Type: text/plain; charset="utf-8"

Dear List,

I am trying to get vertical (separating) lines into matrices, as is possible in tables:

\starttext \startformula \left( \starttable[|c|c|c|] \NC 0 \NC 0\VL 0 \FR \NC 1 \NC 0\VL 1 \FR \stoptable \right) \stopformula \stoptext

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