How can I label the columns and rows of a matrix?

Questions
1

I would like to label the columns and rows of a matrix (e.g. I, J, K, L and M) and ideally also provide an overall label for the rows (winner) and the columns (loser).

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The corresponding functionality (at least for the column and row labels) seems to be in LaTeX through a variety of packages, e.g. matrices - Matrix with rows and columns labeled - TeX - LaTeX Stack Exchange

2

You may use table to recreate the matrix structure.

$ 
#table(
    columns: (auto,)+(3pt,)+(auto,)*5+(3pt,),
    stroke: none,
    align: (right + horizon,) + (center + horizon,)*7,
    [],[], $I$, $J$, $K$, $L$, $M$, [],
    $I$, table.cell(rowspan: 5, box(stroke: none, inset: (top: -0.5em), $lr("[", size: #875%)$)), $0$, $1$, $0$, $1$, $0$, table.cell(rowspan: 5, box(stroke: none, inset: (top: -0.5em), $lr("]", size: #875%)$)),
    $J$, $0$, $0$, $1$, $0$, $1$,
    [winner  $K$], $1$, $0$, $0$, $1$, $1$,
    $L$, $0$, $1$, $0$, $0$, $0$,
    $M$, $0$, $0$, $0$, $1$, $0$,
  )
 $

I don’t know a method that can automatically adjust the size of delimiters.

1 Like
3

Thanks for this solution; it does add the ‘winner’ but not the ‘loser’ (but presumably I could do that above the ‘K’ somehow).

It hadn’t occurred to me that I would be able to get the delimiters using a table but your solution is interesting and I could possibly adapt it so the size is calculated programmatically.