[OS X TeX] Inserting lines in a tableau

[Themis Matsoukas]

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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