On Mon, 15 Mar 2010, Mehdi Omidali wrote:
> Hi,
> Finally, after reading source code of math-ali.mkiv, I found the best way to
> typeset my multiline equation as follows
>
> \starttext
> \placeformula
>
> \startformula
>
> \startalign[n=3]
This means that you must have three "columns" in each line
> \NC x^2 + y^2 \NC = z^2 \NC \NR[eq:1]
>
> \NC\NC = w^2 \NC + u^2\NC \text{(by \in{Equation}[eq:2])} \cr
This has 4 columns. You do not get an error message because you use \cr
instead of \NR. That also messes up the alignment of the next equation.
>
> but I don't know what is going on here. Exactly, eq:2 and eq:3 has the same
> output but they can not be interchanged. Can someone explain this code?
This is how I would do this.
\placeformula \startformula \startalign[n=3]
\NC x^2 + y^2 \NC = z^2 \NC
\NR[eq:1]
\NC \NC = w^2 + u^2 \NC \text{(by \in{Equation}[eq:2])} \NR
\NC \NC \quad + v^2 + r^2 \NC
\NR[eq:2]
\NC \NC \quad + v^2 + r^2 \NC
\NR[eq:3]
\NC \NC = v^2 + r^2 \NC
\NR[eq:4]
\stopalign \stopformula
Aditya
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