梅威瑟:
%! TEX program = lualatex
\documentclass[fleqn, oneside, titlepage = false, fontsize = 12pt]{scrbook}
\usepackage{xparse}
\usepackage{fontspec}
\setmainfont{cmun}[
Extension=.otf,
UprightFont=*rm,
ItalicFont=*ti,
BoldFont=*bx,
BoldItalicFont=*bi,
]
\usepackage{IEEEtrantools}
\NewDocumentEnvironment{sustav3x3xyz}{b}
{%
\noindent\makebox[\textwidth][c]{\begin{minipage}{6cm}
\begin{IEEEeqnarray}{rlCrlCrlCl}
#1
\addtocounter{equation}{1}
\end{IEEEeqnarray}
\end{minipage}}
}{}
% https://tex.stackexchange.com/questions/149370/ieeeeqnarray-tag-like-command
\makeatletter
\newcommand\ztag[1]{%
\def\@currentlabel{#1}%
\gdef\tmp{%
\addtocounter{equation}{-1}%
\def\theequation{#1}}%
\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup
\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup
\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup
\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup
\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup\aftergroup
\aftergroup
\tmp}
\begin{document}
\noindent\makebox[\textwidth][c]{%
\begin{minipage}{6cm}
\begin{IEEEeqnarray}{rlCrlCrlCl}
2&x &+& 2&y &-& 2&z & = & 1 \ztag{1}
\\*
3&x &+& 5&y &-& 2&z & = & 2 \ztag{2}
\\*
3&x &+& 5&y &-& &z & = & 3 \ztag{3}
\addtocounter{equation}{1}
\end{IEEEeqnarray}\end{minipage}}
\begin{sustav3x3xyz}
2&x &+& 2&y &-& 2&z & = & 1 \ztag{1}
\\*
3&x &+& 5&y &-& 2&z & = & 2 \ztag{2}
\\*
3&x &+& 5&y &-& &z & = & 3 \ztag{3}
\end{sustav3x3xyz}
\end{document}
警告
warning| Underfull \hbox (badness 10000) in paragraph ...
警告指的是第二个方程组。如果我删除该系统,警告就会消失。此外,如果我\makebox
从第二个系统中删除,警告也会消失。我使用\makebox
使两个系统水平居中。这两个系统的代码几乎相同,只是第二个系统依赖于\NewDocumentEnvironment
。
答案1
在环境中将 \parfillskip 设置为 0,或者(可能更好)使用 \centering 代替此 \makebox
\NewDocumentEnvironment{sustav3x3xyz}{b}
{%\parfillskip=0pt % with the makebox
\centering
%\noindent\makebox[\textwidth][c]{%
\begin{minipage}{6cm}
\begin{IEEEeqnarray}{rlCrlCrlCl}
#1
\addtocounter{equation}{1}
\end{IEEEeqnarray}
\end{minipage}%
%}
\par% for the centering
}{}
顺便说一句:ztag 定义导致重复的目的地,因此链接无法正常工作:
warning (pdf backend): ignoring duplicate destination with the name 'equation.1
.1.0'