# [OS X TeX] Inserting lines in a tableau

Themis Matsoukas tmatsoukas at icloud.com
Tue Oct 17 14:14:02 EDT 2017

You can use multicolumn to draw custom vertical lines.

\begin{equation*}
\renewcommand{\arraystretch}{2}
\begin{array}{cccc}
\hline
\multicolumn{1}{|c}{\fbox{1}} &
\multicolumn{1}{|c}{2} &
\multicolumn{1}{|c}{3} &
\multicolumn{1}{|c|}{4}
\\\hline
&
\multicolumn{1}{|c}{\fbox{2}} &
\multicolumn{1}{|c}{3} &
\multicolumn{1}{|c|}{4}
\\\cline{2-4}
& &
\multicolumn{1}{|c}{\fbox{3}} &
\multicolumn{1}{|c|}{4}
\\\cline{3-4}
& & &
\multicolumn{1}{|c|}{\fbox{4}}
\\\cline{4-4}
\end{array}
\end{equation*}

Themis

> On Oct 9, 2017, at 2:25 PM, Nitecki, Zbigniew H. <Zbigniew.Nitecki at tufts.edu> wrote:
>
> I am trying to create a table in which each line starts one space later (i.e., it looks like the upper triangular part of a matrix).  The first entry of each
> row is essentially the row number.  The code in the first attachment yields a good version of this (see pdf in second attachment, but I would like
> to also create a grid of lines separating the entries.  I can certainly put in horizontal lines using \hline, but how do I get vertical lines that line up
> in the columns (like I would get if I used a format {|c|c|c|c|}), but do not extend down into the rows where nothing is supposed to appear?
>
>
>
> Zbigniew Nitecki
> Department of Mathematics
> Tufts University
> Medford, MA 02155
>
> telephones:
> Office    (617)627-3843
> Dept.    (617)627-3234
> Dept. fax    (617)627-3966
> http://www.tufts.edu/~znitecki/
>
>
>
>
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