Thanks Otared, that looks very promising. My attempt to wrap the arguments with \NC \NR fails, though. It looks like only the first argument is used, and I am clearly missing something. Also, I’d like to use the example you posted but without the last comma so that in the example below I get (4,5) instead of (4,5,). Matthias \definemathmatrix [pmatrix] [left={\left(\,},right={\,\right)}] \def\docolumnvector#1{\NC#1\NR} \def\columnvector#1 {\startpmatrix \processcommalist[#1]\docolumnvector \stoppmatrix} \def\dorowvector#1{#1,} \def\rowvector#1 {\startpmatrix \processcommalist[#1]\dorowvector \stoppmatrix} \starttext \startformula \columnvector{1,2,3} \stopformula \startformula \rowvector{4,5} \stopformula \stoptext On May 23, 2014, at 6:08 AM, Otared Kavian wrote:

Hi,

Some time ago Wolfgang S. gave a solution to a similar problem: maybe this can help you.

%%%% begin \def\somemacro#1% {\def\dosomemacro##1{Execute ##1, }% \processcommalist[#1]\dosomemacro}

\starttext \somemacro{A,B,C}

\somemacro{E,F} \stoptext %%%% end

Best regards: OK

On 23 May 2014, at 11:54, Matthias Weber wrote:

...

Dear All,

I would like to define a command that expands

\vector{2,4} % or vector[2,4] if that’s easier

to

\startpmatrix \NC 2 \NR \NC 4 \NR \stoppmatrix

and more generally

\vector{2,4,1,7}

to

\startpmatrix \NC 2 \NR \NC 4 \NR \NC 1 \NR \NC 7 \NR \stoppmatrix

Any hints how to achieve this?

Thanks,

Matthias ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

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___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________

Thanks Aditya, but out of the box the following \usemodule[simplematrix] \definesimplematrix[MATRIX][fence=bracket] \starttext \startformula \MATRIX{1,2,3} \MATRIX{1;2;3} \stopformula \stoptext gives me Matthias On May 23, 2014, at 6:56 AM, Aditya Mahajan wrote:

On Fri, 23 May 2014, Matthias Weber wrote:

...

Dear All,

I would like to define a command that expands

\vector{2,4} % or vector[2,4] if that’s easier

to

\startpmatrix \NC 2 \NR \NC 4 \NR \stoppmatrix

and more generally

\vector{2,4,1,7}

to

\startpmatrix \NC 2 \NR \NC 4 \NR \NC 1 \NR \NC 7 \NR \stoppmatrix

Any hints how to achieve this?

Surprisingly, this is not as simple as it may seem at first glance. Some time ago, I had written a module to achieve this. See attached. The usage is:

\usemodule[simplematrix]

\definesimplematrix[MATRIX][fence=bracket]

(any predefined math-fence will work) and then:

\MATRIX{1,2,3} for row vectors and \MATRIX{1;2;3} for column vectors, and \MATRIX{1,2,3; 4,5,6} for matrices.

You can use \definesimplematrix[...][distance=..., align=...] to influence the distance and align keys of mathmatrix.

Aditya___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

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Indeed - I should have checked, I tried this with the TeXLive version. With the current beta it works. Thank! Matthias On May 23, 2014, at 7:37 AM, Aditya Mahajan wrote:

...

Strange. What version of context are you using?

Aditya

Thanks Luigi! Now I have a lot to play with… Matthias On May 23, 2014, at 7:44 AM, luigi scarso wrote:

On Fri, May 23, 2014 at 11:54 AM, Matthias Weber wrote: Dear All,

I would like to define a command that expands

\vector{2,4} % or vector[2,4] if that’s easier

to

\startpmatrix \NC 2 \NR \NC 4 \NR \stoppmatrix

and more generally

\vector{2,4,1,7}

to

\startpmatrix \NC 2 \NR \NC 4 \NR \NC 1 \NR \NC 7 \NR \stoppmatrix

Any hints how to achieve this?

Thanks,

\definemathmatrix [pmatrix] [left={\left(\,},right={\,\right)}]

\startluacode document = document or {} document.matthias = document.matthias or {} local function lua_columnvector(a) context.startpmatrix() for i,v in ipairs(a) do context.NC() context(tostring(v)) context.NR() end context.stoppmatrix() end document.matthias.lua_columnvector = document.matthias.lua_columnvector or lua_columnvector \stopluacode

\def\columnvector#1{\ctxlua{document.matthias.lua_columnvector(#1)}}

\starttext \startformula \columnvector{{1,2,3}} %% watch the double { ! \stopformula

\stoptext

-- luigi ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________