Does this look ok? (code is not production-ready yet, but seems reasonable to me)
Taco \def\startsubstack {\begingroup \null \vcenter\bgroup \pushmacro\domatrixNC \let\endmath\relax \def\NC{\domatrixNC}% \def\MC{\domatrixNC\ifmmode\else$\def\endmath{$}\fi}% \global\let\domatrixNC\dodomatrixNC \def\NR{\endmath% \global\let\domatrixNC\dodomatrixNC \vadjust{\kern -.33\bodyfontsize}\crcr}% \mathsurround\zeropoint \everycr\emptytoks \halign\bgroup \hfil$\scriptstyle ##$\hfil\crcr } \def\stopsubstack {\crcr \egroup \popmacro\domatrixNC \egroup \endgroup} \starttext \startformula \sum_{% \startsubstack i = 1 \NR i \neq n \NR i \neq m \stopsubstack }a_i \stopformula \stoptext Aditya Mahajan wrote: > <--- On Jan 28, Taco Hoekwater wrote ---> > >>Aditya Mahajan wrote: >> >>>>The definition from m-newmat is at least partly superceded by the >>>>new core math definitions Hans added last week, so a new implementation >>>>would be better. >>> >>>Can you suggest something? >> >>Like this maybe? >> >>\def\substack#1% >> {\begingroup >> \let\\\cr >> \startmathmatrix #1\stopmathmatrix >> \endgroup} >> >>Probably needs a bit of tweaking to make it look better >>(perhaps a [strut=no] parameter?). >> > > > <--- On Jan 28, Vit Zyka wrote ---> > >>What about use math primitive \atop: >> >>\def\substack#1% >> {\begingroup >> \let\\\atop >> #1 >> \endgroup} >> > > > > Sorry for not getting back for almost a month. Both suggestions work > only partially. Consider > > \startmathformula > \sum_{% > \startmathmatrix > i = 1 \NR i \neq n \NR i \neq m > \stopmathmatrix > }a_i > \stopformula > > As Taco mentioned, the spacing is bad. > > \atop gives correct spacing but you need to put subscripts in groups > of two. > > \startformula > \sum_{ {i = 1 \atop i \neq n}\atop i \neq m } a_i > \stopformula > > Moreover, the font size is incorrect in both cases. Compare with the > size of the subscript in \sum_{i = 1}. > > Any suggestions? > > Aditya > _______________________________________________ > ntg-context mailing list > ntg-context@ntg.nl > http://www.ntg.nl/mailman/listinfo/ntg-context _______________________________________________ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context