Difference between revisions of "\startcases"
| Line 6: | Line 6: | ||
\startalign,\stopalign | \startalign,\stopalign | ||
</pre> | </pre> | ||
| − | Each has its own advantage and can be customized: for a thorough understanding of these commands please refer to Aditya Mohajan's excellent user's guide | + | Each has its own advantage and can be customized: for a thorough understanding of these commands please |
| − | [http://dl.contextgarden.net/myway/mathalign.pdf Using \startalign and friends]. These commands can be found in [[source:core-mat.tex|core-mat.tex]] file, which contains most of the core ConTeXt math macros. | + | refer to Aditya Mohajan's excellent user's guide |
| + | [http://dl.contextgarden.net/myway/mathalign.pdf Using \startalign and friends]. | ||
| + | These commands can be found in [[source:core-mat.tex|core-mat.tex]] file, which contains | ||
| + | most of the core ConTeXt math macros. | ||
<pre> | <pre> | ||
| Line 26: | Line 29: | ||
\stopmatrix | \stopmatrix | ||
\stopformula | \stopformula | ||
| − | In these structures it is important (well, in the above example it is not important and the result is the same, but I have been told that it is necessary in some other situations...) to notice that the sign | + | |
| + | \stoptext | ||
| + | </pre> | ||
| + | In these structures it is important (well, in the above example it is not important and the result is the same, but I have been told that it is necessary in some other situations...) to notice that the sign "=" is preceded by "\NC{}, since | ||
otherwise that sign would be considered as a binary operator and the alignment would be | otherwise that sign would be considered as a binary operator and the alignment would be | ||
disturbed (at least this is what I guess…Otared K.). | disturbed (at least this is what I guess…Otared K.). | ||
| − | |||
| − | |||
One of the powerful structures in displaying mathematical formulas is the possibility of defining custom maths alignment. | One of the powerful structures in displaying mathematical formulas is the possibility of defining custom maths alignment. | ||
For instance the following definition | For instance the following definition | ||
Revision as of 21:29, 19 January 2009
There are several built-in commands for displaying mathematical formulas. For instance
\startcases, \stopcases \startmathmatrix, \stopmathmatrix \startalign,\stopalign
Each has its own advantage and can be customized: for a thorough understanding of these commands please refer to Aditya Mohajan's excellent user's guide Using \startalign and friends. These commands can be found in core-mat.tex file, which contains most of the core ConTeXt math macros.
\starttext
This is an example of aligned equations:
\startformula
\startcases[align={right,left},distance=3pt]
\NC 2x + 3y \NC{} = 10 \NR
\NC 3x + 2y \NC{} = 5, \NR
\stopcases
\stopformula
and this is another one:
\startformula
\startmatrix[align={right,left},distance=3pt,left={\left\{}, right={\right.}]
\NC 2x + 3y \NC{} = 10 \NR
\NC 3x + 2y \NC{} = 5 \NR
\stopmatrix
\stopformula
\stoptext
In these structures it is important (well, in the above example it is not important and the result is the same, but I have been told that it is necessary in some other situations...) to notice that the sign "=" is preceded by "\NC{}, since otherwise that sign would be considered as a binary operator and the alignment would be disturbed (at least this is what I guess…Otared K.).
One of the powerful structures in displaying mathematical formulas is the possibility of defining custom maths alignment. For instance the following definition
\definemathmatrix[alignedcases]
[align={right,left,left},
distance=3pt,
left={\left\{},
right={\right.},
style=\displaystyle]
creates two new commands,
\startalignedcases, \stopalignedcases:
after which one may use them in a displayed formula as follows:
\starttext
The following formula is displayed in two lines with an appropriate alignment of the equations:
\startformula
\startalignedcases
\NC -\Delta u + g(u) \NC{} = f \NC \quad\mbox{in } \Omega\NR
\NC {\partial u \over \partial {\bf n} } \NC{} = h(u) \NC \quad\mbox{on } \partial\Omega \NR
\stopalignedcases
\stopformula
\stoptext
