在 中NiceMatrix，有没有办法设置块的垂直位置？
例如，
\documentclass{standalone}
\usepackage{nicematrix}
\begin{document}
\begin{NiceTabular}{ccc}
\Block{3-2}{A} & & 0 \\
& & 0 \\
& & 0 \\
0 & 0 & 0
\end{NiceTabular}
\end{document}
此代码产生：
我可以使用 l、c 和 r 选项设置水平位置，但是有没有办法设置块的垂直位置？
答案1
更新
\HighBlock该答案中给出的命令和代码所实现的功能\LowBlock已集成到 6.14 版nicematrix(2023/02/18)中，其中包含命令 的键T 和。B\Block
\documentclass{article}
\usepackage{nicematrix}
\begin{document}
With the key \verb|T|
\begin{NiceTabular}{ccc}
\Block[T]{3-2}{\Huge A} & & 0 \\
& & 0 \\
& & 0 \\
0 & 0 & 0
\end{NiceTabular}
\bigskip
With the key \verb|B|
\begin{NiceTabular}{ccc}
\Block[B]{3-2}{\Huge A} & & 0 \\
& & 0 \\
& & 0 \\
0 & 0 & 0
\end{NiceTabular}
\end{document}
与往常一样nicematrix，您需要进行多次编译。
对于这些键T，B边距（上方和下方）等于inner ysepPGF/Tikz 的参数。下面是将该参数设置为 0 pt 的示例。
\documentclass{article}
\usepackage{nicematrix}
\usepackage{tikz}
\begin{document}
\NiceMatrixOptions{hvlines,rules/color=gray!15}
\pgfset{inner sep = 0pt}
With the key \verb|T|
\begin{NiceTabular}{ccc}
\Block[T]{3-2}{\Huge A} & & 0 \\
& & 0 \\
& & 0 \\
0 & 0 & 0
\end{NiceTabular}
\bigskip
With the key \verb|B|
\begin{NiceTabular}{ccc}
\Block[B]{3-2}{\Huge p} & & 0 \\
& & 0 \\
& & 0 \\
0 & 0 & 0
\end{NiceTabular}
\end{document}
目前，命令中没有\Block设置垂直对齐的选项。我可能会在将来的版本中添加该功能nicematrix。
就目前而言，可以定义两个命令\HighBlock来\LowBlock执行该作业（没有内置命令的选项\Block...）。
代码没有使用包的任何私有命令nicematrix。
\documentclass{article}
\usepackage{nicematrix}
\begin{document}
\ExplSyntaxOn
\makeatletter
\NewDocumentCommand { \HighBlock } { m m }
{
\tl_gput_right:Nx \g_nicematrix_code_after_tl
{
\__Alan_high_block:nnnn
{ \int_use:c { c@iRow } }
{ \int_use:c { c@jCol } }
{ #1 }
{ \exp_not:n { #2 } }
}
}
\cs_new_protected:Nn \__Alan_high_block:nnnn
{
\__Alan_analyze:w #3 \q_stop
\pgfpicture
\pgfrememberpicturepositiononpagetrue
\pgf@relevantforpicturesizefalse
\__nicematrix_qpoint:n { row - #1 }
\dim_set_eq:NN \l_tmpa_dim \pgf@y
\__nicematrix_qpoint:n { col - #2 }
\dim_set_eq:NN \l_tmpb_dim \pgf@x
\__nicematrix_qpoint:n { col - \int_eval:n { #2 + \l_tmpb_int } }
\pgftransformshift { \pgfpoint { \dim_eval:n { (\l_tmpb_dim + \pgf@x) / 2 } } { \l_tmpa_dim } }
\pgfnode
{ rectangle }
{ north }
{ #4 }
{ }
{ }
\endpgfpicture
}
\NewDocumentCommand { \LowBlock } { m m }
{
\tl_gput_right:Nx \g_nicematrix_code_after_tl
{
\__Alan_low_block:nnnn
{ \int_use:c { c@iRow } }
{ \int_use:c { c@jCol } }
{ #1 }
{ \exp_not:n { #2 } }
}
}
\cs_new_protected:Nn \__Alan_low_block:nnnn
{
\__Alan_analyze:w #3 \q_stop
\pgfpicture
\pgfrememberpicturepositiononpagetrue
\pgf@relevantforpicturesizefalse
\__nicematrix_qpoint:n { row - \int_eval:n { #1 + \l_tmpa_int } }
\dim_set_eq:NN \l_tmpa_dim \pgf@y
\__nicematrix_qpoint:n { col - #2 }
\dim_set_eq:NN \l_tmpb_dim \pgf@x
\__nicematrix_qpoint:n { col - \int_eval:n { #2 + \l_tmpb_int } }
\pgftransformshift { \pgfpoint { \dim_eval:n { (\l_tmpb_dim + \pgf@x) / 2 } } { \l_tmpa_dim } }
\pgfnode
{ rectangle }
{ south }
{ #4 }
{ }
{ }
\endpgfpicture
}
\cs_new_protected:Npn \__Alan_analyze:w #1 - #2 \q_stop
{
\int_set:Nn \l_tmpa_int { #1 }
\int_set:Nn \l_tmpb_int { #2 }
}
\makeatother
\ExplSyntaxOff
With \verb|\HighBlock{3-2}{\Huge A}|
\begin{NiceTabular}{ccc}
\HighBlock{3-2}{\Huge A} & & 0 \\
& & 0 \\
& & 0 \\
0 & 0 & 0
\end{NiceTabular}
\bigskip
With \verb|\LowBlock{3-2}{\Huge A}|
\begin{NiceTabular}{ccc}
\LowBlock{3-2}{\Huge A} & & 0 \\
& & 0 \\
& & 0 \\
0 & 0 & 0
\end{NiceTabular}
\end{document}
与往常一样nicematrix，您需要进行多次编译（因为 PGF/Tikz 节点）。
这部分是对 Avi Vajpeyi 在评论中提出的问题的回答。该版本的命令\HighBlock在块中排版一个段落。代码不使用 的内部结构nicematrix。
\documentclass{article}
\usepackage{nicematrix}
\begin{document}
\ExplSyntaxOn
\makeatletter
\NewDocumentCommand { \HighBlock } { O { } m m }
{
\HighBlockAux { #2 } { #3 }
\Block [ #1 ] { #2 } { }
}
\NewDocumentCommand { \HighBlockAux } { > { \SplitArgument { 1 } { - } } m m }
{
\tl_gput_right:Nx \g_nicematrix_code_after_tl
{
\__Avi_high_block:nnnnn
{ \int_use:c { c@iRow } } % row of first cell
{ \int_use:c { c@jCol } } % col of first cell
#1 % { i } { j } where i/j is the number of rows/cols
{ \exp_not:n { #2 } } % contents of the block
}
}
\cs_new_protected:Nn \__Avi_high_block:nnnnn
{
\dim_zero_new:N \l__Avi_y_top_line_dim
\dim_zero_new:N \l__Avi_left_dim
\dim_zero_new:N \l__Avi_right_dim
\dim_zero_new:N \l__Avi_width_block_dim
%
\pgfpicture
\pgfrememberpicturepositiononpagetrue
\pgf@relevantforpicturesizefalse
\pgfpointanchor { nm - \NiceMatrixLastEnv - row - #1 - base } { center }
\dim_set_eq:NN \l__Avi_y_top_line_dim \pgf@y
\pgfpointanchor { nm - \NiceMatrixLastEnv - #2 } { center }
\dim_set_eq:NN \l__Avi_left_dim \pgf@x
\pgfpointanchor { nm - \NiceMatrixLastEnv - \int_eval:n { #2 + #4 } } { center }
\dim_set_eq:NN \l__Avi_right_dim \pgf@x
\pgftransformshift
{
\pgfpoint
{ \dim_eval:n { (\l__Avi_left_dim + \l__Avi_right_dim) / 2 } }
{ \l__Avi_y_top_line_dim }
}
\dim_set:Nn \l__Avi_width_block_dim
{ \l__Avi_right_dim - \l__Avi_left_dim - 2 \tabcolsep }
\pgfnode
{ rectangle }
{ base }
{
\begin { minipage } [ t ] { \l__Avi_width_block_dim }
#5
\end { minipage }
}
{ }
{ }
\endpgfpicture
}
\makeatother
\ExplSyntaxOff
\begin{NiceTabular}{ccccccccc}[hvlines]
\HighBlock{7-8}{The text is that block is automaticaly
wrapped to the size of the block (but no space
is created by the block itself!}
& & & & & & & & 1 \\
& & & & & & & & 2 \\
& & & & & & & & 3 \\
& & & & & & & & 4 \\
& & & & & & & & 5 \\
& & & & & & & & 6 \\
& & & & & & & & 7 \\
1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 0
\end{NiceTabular}
\end{document}
