TeX - LaTeX Asked on May 28, 2021
I have the following example:
documentclass{article}
usepackage[english]{babel}
usepackage{booktabs}
usepackage{array}
usepackage{blkarray}
begin{document}
begin{equation}label{cexA_Rmat}
mathbf{R}=
begin{blockarray}{cccccc}
& lambda_1 & lambda_2 & lambda_3 & lambda_4
cmidrule{2-6}
begin{block}{c|(ccccc)}
tau_1 & -1 & phantom{-}1 & phantom{-}0 & phantom{-}0
tau_2 & phantom{-}0 & -1 & phantom{-}1 & phantom{-}0
tau_3 & phantom{-}0 & phantom{-}0 & phantom{-}1 & -1
tau_4 & -1 & phantom{-}0 & phantom{-}0 & phantom{-}1
end{block}
end{blockarray}
end{equation}
end{document}
where I would like to add extra space between column $tau_i$ (i=1,2,3,4) and the left-side matrix parenthesis. As you can see in the enclosed image, there the left parenthesis and the vertical line are totally overlapped. How can I increase their distance (as well as the distance between the $tau_i$s and the vertical line)?
Insert a space within the column specification of your blockarray
:
documentclass{article}
usepackage{booktabs}
usepackage{blkarray}
begin{document}
[
mathbf{R} =
begin{blockarray}{ cccccc }
& lambda_1 & lambda_2 & lambda_3 & lambda_4
cmidrule{2-6}
begin{block}{@{} c @{hspace{1ex}} | @{quad} (ccccc) }
tau_1 & -1 & phantom{-}1 & phantom{-}0 & phantom{-}0
tau_2 & phantom{-}0 & -1 & phantom{-}1 & phantom{-}0
tau_3 & phantom{-}0 & phantom{-}0 & phantom{-}1 & -1
tau_4 & -1 & phantom{-}0 & phantom{-}0 & phantom{-}1
end{block}
end{blockarray}
]
end{document}
Also note the removal of the inter-column space (using @{}
) at the beginning of the nested block
.
Correct answer by Werner on May 28, 2021
With {pNiceArray}
of nicematrix
.
documentclass{article}
usepackage{nicematrix,tikz}
begin{document}
[mathbf{R}=
begin{pNiceArray}{cccc}[first-col,first-row]
& lambda_1 & lambda_2 & lambda_3 & lambda_4
hline
noalign{vskip2pt}
tau_1 & -1 & phantom{-}1 & phantom{-}0 & phantom{-}0
tau_2 & phantom{-}0 & -1 & phantom{-}1 & phantom{-}0
tau_3 & phantom{-}0 & phantom{-}0 & phantom{-}1 & -1
tau_4 & -1 & phantom{-}0 & phantom{-}0 & phantom{-}1
CodeAfter
tikz draw ([xshift=-2pt]1-|1) -- ([xshift=-2pt]5-|1) ;
end{pNiceArray}]
end{document}
Answered by F. Pantigny on May 28, 2021
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