On Sat, 14 May 2011, Alasdair McAndrew wrote:
Hello,
I'm trying to typeset some linear algebra exercises for my students; the
exercises will be within a table, and each second element will be a system
of linear equations. This sort of thing:
\starttable[|l|M|l|M|]
\NC (a) \NC %
\startmathalignment[n=7,align={right,middle,right,middle,right,middle,right}]
\NC 3x\NC +\NC 6y\NC -\NC 2z\NC =\NC -13\NR
\NC -6x\NC -\NC 9y\NC +\NC 5z\NC =\NC 22\NR
\NC 3x\NC +\NC 3y\NC -\NC 5z\NC =\NC -13\NR
\stopmathalignment
\NC (b) \NC %
\startmathalignment[n=7,align={right,middle,right,middle,right,middle,right}]
\NC x\NC +\NC 3y\NC +\NC 3z\NC =\NC -4\NR
\NC x\NC +\NC 4y\NC +\NC 5z\NC =\NC -5\NR
\NC 2x\NC +\NC 4y\NC +\NC 3z\NC =\NC -5\NR
\stopmathalignment
\NC\AR
\stoptable
But this doesn't work. There seems to be a problem with the mathalignment
environment within the table. What do I need enclose these in so that they
will be treated as displayed equations within the table environment?
(Untested): \framed[align=normal,width=fit]{\startformula
\startmathalignment ... \stopmathalignment \stopformula}
math alignment is a display math environment, and must be inside a
\startformula ... \stopformula.
Two comments:
1. You know about \definemathalignment, right?
2. I think that this effect can be obtained more easily using
\startitemize[two,columns,a]
\item ...
\item ..
\stopitemize
but you might need to insert a negative \vskip (or \blank) to get matrix
to align with the item symbol.
Aditya
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