Hi, What is the context equivalent of latex's substack? How do I type the following $$ \sum_{\substack i \in P \\ j \in Q} a_{ij} $$ I search on source browser shows that this command was defined in newmat but pruned out. Is there a replacement for it? Is it safe to simply copy the definitions from mnewmat.tex and use them in my project? Thanks Aditya  Aditya Mahajan, EECS Systems, University of Michigan http://www.eecs.umich.edu/~adityam  Ph: 7342624008
Aditya Mahajan wrote:
Hi,
What is the context equivalent of latex's substack? How do I type the following $$ \sum_{\substack i \in P \\ j \in Q} a_{ij} $$
Where is that defined? LateX gives me and 'Undefined control sequence', and with \usepackage{amsmath} I get no error, but not a stack either. The definition from mnewmat is at least partly superceded by the new core math definitions Hans added last week, so a new implementation would be better. Cheers, Taco
< On Jan 28, Taco Hoekwater wrote >
Aditya Mahajan wrote:
Hi,
What is the context equivalent of latex's substack? How do I type the following $$ \sum_{\substack i \in P \\ j \in Q} a_{ij} $$
Where is that defined? LateX gives me and 'Undefined control sequence', and with \usepackage{amsmath} I get no error, but not a stack either.
This is defined in amsmath. Sorry, I made a mistake in typing. It should be $$ \sum_{\substack{ a \\ b}} c $$
The definition from mnewmat is at least partly superceded by the new core math definitions Hans added last week, so a new implementation would be better.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?  Aditya Mahajan, EECS Systems, University of Michigan http://www.eecs.umich.edu/~adityam  Ph: 7342624008
Aditya Mahajan wrote:
The definition from mnewmat is at least partly superceded by the new core math definitions Hans added last week, so a new implementation would be better.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?). Cheers ,taco
Taco Hoekwater wrote:
Aditya Mahajan wrote:
The definition from mnewmat is at least partly superceded by the new core math definitions Hans added last week, so a new implementation would be better.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?).
What about use math primitive \atop: \def\substack#1% {\begingroup \let\\\atop #1 \endgroup} Vit
< On Jan 28, Taco Hoekwater wrote >
Aditya Mahajan wrote:
The definition from mnewmat 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
Does this look ok? (code is not productionready 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 mnewmat 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 _______________________________________________ ntgcontext mailing list ntgcontext@ntg.nl http://www.ntg.nl/mailman/listinfo/ntgcontext
< On Feb 22, Taco Hoekwater wrote >
Does this look ok? (code is not productionready yet, but seems reasonable to me)
[code snipped]
Yes, looks good to my eyes. Thanks a lot. Aditya  Aditya Mahajan, EECS Systems, University of Michigan http://www.eecs.umich.edu/~adityam  Ph: 7342624008
Taco Hoekwater wrote:
Does this look ok? (code is not productionready 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}
without vadjust: (mathstrut + nointerlineskip) \def\startsubstack {\begingroup \null \vcenter\bgroup \pushmacro\domatrixNC \let\stopmathmode\relax % to be sure, will go away \def\NC{\domatrixNC}% \def\MC{\domatrixNC\startmathmode}% \global\let\domatrixNC\dodomatrixNC \def\NR{\stopmathmode \global\let\domatrixNC\dodomatrixNC \crcr\noalign{\nointerlineskip}}% \mathsurround\zeropoint \everycr\emptytoks \halign\bgroup\hfil$\scriptstyle\mathstrut##$\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 mnewmat 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 _______________________________________________ ntgcontext mailing list ntgcontext@ntg.nl http://www.ntg.nl/mailman/listinfo/ntgcontext
_______________________________________________ ntgcontext mailing list ntgcontext@ntg.nl http://www.ntg.nl/mailman/listinfo/ntgcontext
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participants (4)

Aditya Mahajan

Hans Hagen

Taco Hoekwater

Vit Zyka