> 
> Message: 1
> Date: Fri, 23 May 2014 13:44:30 +0200
> From: luigi scarso <luigi.scarso@gmail.com>
> To: mailing list for ConTeXt users <ntg-context@ntg.nl>
> Subject: Re: [NTG-context] Simple command with variable number of
> 	arguments
> Message-ID:
> 	<CAG5iGsCadu33Hw=hPhmDe+Wp1B_FcPjN0CaXwJAso+vnQBJEtA@mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
> 
> On Fri, May 23, 2014 at 11:54 AM, Matthias Weber <matweber@indiana.edu>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
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