On Mon, 17 Jul 2006, Hans Hagen wrote:
> Bruce H. Wagner wrote:
>>
>>
>> Incidentally, the reason I am using the LaTeX syntax is that we are
>> translating LaTeX code into Context automatically using a perl script, and
>> it's therefore much easier to stick to whatever LaTeX code works.
>> Basically, I just want something comparable to the array environment in
>> LaTeX, which works very nicely.
>>
> Aditya is in more or less charge of the specification/tryout part of the math
> extensions and taco/myself implement things based on that input, so i suggest
> that the two of you come up with specs
Context supports everything that latex array provides, with a slightly
different syntax. Some extract from the update on myway on alignment
(I am still working on it)
% \def\ShowExample
% {\hairline
% \typebuffer
% \hairline
% \getbuffer}
\CONTEXT\ provides \tex{startmatrix} for generic alignment mechanism.
\startbuffer
\startformula
\startmatrix
\NC A \NC B \NC C \NR
\NC a \NC b \NC c \NR
\NC 1 \NC 2 \NC 3 \NR
\stopmatrix
\stopformula
\stopbuffer
\ShowExample
It can take a \type<<left=>> and \type<<right=>> option which can be
used to
typeset matrices
\startbuffer
\startformula
I = \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
\stopbuffer
\ShowExample
It is possible to \tex{definemathmatrix} to use the construct
repeatedly.
\startbuffer
% Paranthesis
\definemathmatrix
[pmatrix]
[left={\left(\,},right={\,\right)}]
% Brackets
\definemathmatrix
[bmatrix]
[left={\left[\,},right={\,\right]}]
% Curly braces
\definemathmatrix
[Bmatrix]
[left={\left\{\,},right={\,\right\}}]
% vertical bars
\definemathmatrix
[vmatrix]
[left={\left\vert\,},right={\,\right\vert}]
% double vertical bars
\definemathmatrix
[Vmatrix]
[left={\left\Vert\,},right={\,\right\Vert}]
\startformula
I = \startpmatrix
\NC 1 \NC 0 \NC 0 \NR
\NC 0 \NC 1 \NC 0 \NR
\NC 0 \NC 0 \NC 1 \NR
\stoppmatrix
= \startbmatrix
\NC 1 \NC 0 \NC 0 \NR
\NC 0 \NC 1 \NC 0 \NR
\NC 0 \NC 0 \NC 1 \NR
\stopbmatrix
= \startBmatrix
\NC 1 \NC 0 \NC 0 \NR
\NC 0 \NC 1 \NC 0 \NR
\NC 0 \NC 0 \NC 1 \NR
\stopBmatrix
\stopformula
\startformula
\startvmatrix
\NC a \NC b \NR
\NC c \NC d \NR
\stopvmatrix
\quad
\startVmatrix
\NC a \NC b \NR
\NC c \NC d \NR
\stopVmatrix
\stopformula
\stopbuffer
\ShowExample
It is possible to change the alignment of columns using \type{align=}
option.
\startbuffer
\startformula
\text{Let } A = \startpmatrix[align={left,right}]
\NC 1 \NC 2 \NR
\NC 3 \NC -5 \NR
\stoppmatrix
\stopformula
\stopbuffer
\ShowExample
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