hdotsfor replacement

hdotsfor replacement

[Michail Vidiassov]

Dear All,

is there a replacement of "hdotsfor" from LaTeX to fill
several cells in a matrix row with one long series of dots?

        Sincerely, Michail
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Re: hdotsfor replacement

[Aditya Mahajan]

On Mon, 17 Aug 2009, Michail Vidiassov wrote:

> Dear All,
>
> is there a replacement of "hdotsfor" from LaTeX to fill
> several cells in a matrix row with one long series of dots?

Not that I know of. Currently, you can manually do this using TeX 
primitives.

\starttext

\startformula
   \startmathmatrix
     \NC a \NC b \NC c \NR
     \NC \spanomit\spanomit{\dotfill} \NR
     \NC e \NC d \NC adlsadjsak \NR
   \stopmathmatrix
   \startmathmatrix
     \NC a \NC b \NC c \NR
     \NC 45 \NC \omit\spanomit{\dotfill} \NR
     \NC e \NC d \NC adlsadjsak \NR
   \stopmathmatrix
\stopformula

\stoptext

Hans, can we have a command to do this? Basically, \hdotsfor does two 
things. Span a specific number of columns and fill them with dots. The 
spacing between the dots should be configurable.

This is how amsmath defines it.

\newcommand{\hdotsfor}[1]{%
   \ifx[#1\@xp\shdots@for\else\hdots@for\@ne{#1}\fi}
\newmuskip\dotsspace@
\def\shdots@for#1]{\hdots@for{#1}}
\def\hdots@for#1#2{\multicolumn{#2}c%
   {\m@th\dotsspace@1.5mu\mkern-#1\dotsspace@
    \xleaders\hbox{$\m@th\mkern#1\dotsspace@.\mkern#1\dotsspace@$}%
            \hfill
    \mkern-#1\dotsspace@}%
    }

I think that in Context, we can have the following.

\definemathmatrix[matrix][dotspaces=...]

and then in a matrix environment, \DC[3] (dot columns 3) expands to the 
correct number of \omit and \spanomits. What do you think?

Aditya

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Re: hdotsfor replacement

[Michail Vidiassov]

Dear Aditya and All,

On Sun, 16 Aug 2009, Aditya Mahajan wrote:

>> is there a replacement of "hdotsfor" from LaTeX to fill
>> several cells in a matrix row with one long series of dots?
>
> Not that I know of. Currently, you can manually do this using TeX primitives.
>
> \startformula
>  \startmathmatrix
>    \NC a \NC b \NC c \NR
>    \NC \spanomit\spanomit{\dotfill} \NR
>    \NC e \NC d \NC adlsadjsak \NR
>  \stopmathmatrix
>  \startmathmatrix
>    \NC a \NC b \NC c \NR
>    \NC 45 \NC \omit\spanomit{\dotfill} \NR
>    \NC e \NC d \NC adlsadjsak \NR
>  \stopmathmatrix
> \stopformula

"\multispan{num}{\dotfill}" may be an alternative for 
\omit\spanomit\spanomit\..., but half of the white space
separating columns has to be added before dots in any case.
How to do get that amount?
In the above examples dots appear to be shifted to the left
from the desired position.
     Sincerely, Michail


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