[NTG-context] Problem with \definemathmatrix

Aditya Mahajan adityam at umich.edu
Thu Jan 18 04:53:57 CET 2018


On Wed, 17 Jan 2018, Fabrice Couvreur wrote:

> Hello,
> This macro that is not mine worked very well. I just tested the following
> file and there is a problem.

Otared has already answered your question but ...

> \math{M^3=\startpmatrix
>       \NC 2 \NC 3 \NC 6  \NC 4 \NC 2 \NC 7  \NC 3  \NC 1 \NR
>       \NC 3 \NC 0 \NC 1  \NC 1 \NC 2 \NC 3  \NC 6  \NC 4 \NR
>       \NC 6 \NC 1 \NC 4  \NC 4 \NC 4 \NC 9  \NC 10 \NC 6 \NR
>       \NC 4 \NC 1 \NC 4  \NC 4 \NC 5 \NC 8  \NC 8  \NC 3 \NR
>       \NC 2 \NC 2 \NC 4  \NC 5 \NC 2 \NC 7  \NC 3  \NC 1 \NR
>       \NC 7 \NC 3 \NC 9  \NC 8 \NC 7 \NC 8  \NC 10 \NC 3 \NR
>       \NC 3 \NC 6 \NC 10 \NC 8 \NC 3 \NC 10 \NC 4  \NC 1 \NR
>       \NC 1 \NC 4 \NC 6  \NC 3 \NC 1 \NC 3  \NC 1  \NC 0 \NR
>
>     \stoppmatrix}

If you type a lot of such matrices, you might find the attached module 
interesting. Using it you can use matlab-like syntax for writing matrices:

\usemodule[simplematrix]
\definesimplematrix[MATRIX][fence=parenthesis, align=middle]

\starttext
$\MATRIX{1,2,3,4;5,6,7,8;9,10,11,12}$
\stoptext

Aditya
-------------- next part --------------
%D \module
%D   [     file=t-simplematrix,
%D      version=2014.02.18,
%D        title=\CONTEXT\ User Module,
%D     subtitle=Simple matrix,
%D       author=Aditya Mahajan,
%D         date=\currentdate,
%D    copyright=Aditya Mahajan,
%D        email=adityam <at> ieee <dot> org,
%D      license=Simplified BSD License]

\writestatus{loading}{Simple matrix (ver: 2014.02.18)}

\startmodule[simplematrix]

\unprotect

\definenamespace
  [simplematrix]
  [   \c!type=module,
      \c!name=simplematrix,
   \c!command=\v!yes,
        setup=\v!list,
    \s!parent=simplematrix,
  ]

\setupsimplematrix
  [
    \c!distance=\emwidth,
    \c!mathstyle=,
    fence=bracket,
    \c!align=
  ]

\appendtoks
  \setevalue{\currentsimplematrix}{\usesimplematrix[\currentsimplematrix]}
\to \everydefinesimplematrix

\newtoks\simplematrixtoks

\define[1]\simplematrix_row
    {\processcommalist[#1]\simplematrix_col
     \appendtoks \NR \to \simplematrixtoks}

\define[1]\simplematrix_col
    {\appendtoks \NC #1 \to \simplematrixtoks}

\unexpanded\def\usesimplematrix
    {\dodoubleargument\usesimplematrix_indeed}

\def\simplematrix_left
    {\edef\p_left{\namedmathfenceparameter{\simplematrixparameter{fence}}\c!left}%
     \normalleft\ifx\p_left\empty.\else\Udelimiter\plusfour\fam\p_left\relax\fi
     \,}

\def\simplematrix_right
    {\edef\p_right{\namedmathfenceparameter{\simplematrixparameter{fence}}\c!right}%
     \,
     \normalright\ifx\p_right\empty.\else\Udelimiter\plusfive\fam\p_right\relax\fi}
     

\def\usesimplematrix_indeed[#name][#options]#matrix%
    {\begingroup
     \edef\currentsimplematrix{#name}%
     \setupsimplematrix[#name][#options]%
     \simplematrixtoks\emptytoks
     \startusemathstyleparameter\simplematrixparameter
     \appendtoks 
           \bgroup
           \startmathmatrix
            [
              \c!distance=\simplematrixparameter\c!distance,
              \c!left=\simplematrix_left,
              \c!right=\simplematrix_right,
              \c!align=\simplematrixparameter\c!align,
            ]
        \to \simplematrixtoks
     \processlist[];\simplematrix_row[#matrix]%
     \appendtoks \stopmathmatrix \egroup \to \simplematrixtoks
     \the\simplematrixtoks
     \stopusemathstyleparameter
     \endgroup}

\protect

\stopmodule


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