我正在使用给出的答案这里为amsmath环境自定义标签。但是，使用此cleveref包，除了equation生成警告之外，其他类型还会生成警告：
LaTeX Warning: cref reference format for label type `matrix' undefined on input 58
LaTeX Warning: cref reference format for label type `matrix' undefined on input 68
并且方程式引用前面对应??于未定义的类型。
我可以在标签标记中指定类型equation以避免出现此警告。有没有办法在序言中执行此操作而不必修改每个标签？设置\crefalias{align}{equation}无效。
我用于测试的例子是
\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{etoolbox}
\usepackage{cleveref}
\crefname{equation}{Eq.}{Eqs.}
\Crefname{equation}{Equation}{Equations}
\newcounter{matrix}
\renewcommand*{\thematrix}{M\arabic{matrix}}
\makeatletter
\def\@equationname{equation}
\newenvironment{m}[1]{%
\def\mymathenvironmenttouse{#1}%
\ifx\mymathenvironmenttouse\@equationname%
\refstepcounter{matrix}%
\else
\patchcmd{\@arrayparboxrestore}{equation}{matrix}{}{}% doesn't change output?
\patchcmd{\print@eqnum}{equation}{matrix}{}{}%
\patchcmd{\incr@eqnum}{equation}{matrix}{}{}%
% \def\print@eqnum{\tagform@\thematrix}% instead of etoolbox' \pathcmd
% \def\incr@eqnum{\refstepcounter{matrix}\let\incr@eqnum\@empty}% instead of etoolbox' \pathcmd
\fi
\csname\mymathenvironmenttouse\endcsname%
}{%
\ifx\mymathenvironmenttouse\@equationname%
\tag{\thematrix}%
\fi
\csname end\mymathenvironmenttouse\endcsname%
}
\makeatother
\begin{document}
\begin{equation} \label{eq:2}
y = x
\end{equation}
The next matrix equation is \cref{eq:m1}.
\begin{m}{equation}
y = \sqrt x \label{eq:m1}
\end{m}
\begin{align}
\alpha &= \beta \label{eq:1} \\
\delta &= \gamma \label{eq:4}
\end{align}
The previous standard equation is \cref{eq:2} and align is \cref{eq:1,eq:4}.
The next matrix equations (align) are \cref{eq:m2,eq:m3}.
\begin{m}{align}
y &= \sqrt x \label{eq:m2} \\
z &= y^2 \label[equation]{eq:m3}
\end{m}
\begin{m}{alignat}{3}
y & = \sqrt x & \quad y^2 &= x & \quad z &= c \label[equation]{eq:m4} \\
p & = q/r & & & & \label{eq:m5}
\end{m}
The previous matrix equations (alignat) are \cref{eq:m4,eq:m5}.
\end{document}
我还想删除matrix m环境后的多余空间。
答案1
我相信你想要的是以下内容：
\crefname{matrix}{Eq.}{Eqs.}
\Crefname{matrix}{Equation}{Equations}
\creflabelformat{matrix}{#2(#1)#3}
关于“矩阵环境后的多余空间m”，您可以看到几个连续的align环境被空白行 ( \par) 分隔开，这也是同样的情况。我认为这只是为了避免。不过，可以通过将这些空白行替换为仅包含 的行来减少空间%——见下文。
\documentclass{article}
\usepackage{amsmath}
\usepackage{etoolbox}
% \usepackage{hyperref} % load it before cleveref, but not earlier than that
\usepackage{cleveref}
\crefname{equation}{Eq.}{Eqs.}
\Crefname{equation}{Equation}{Equations}
\crefname{matrix}{Eq.}{Eqs.}
\Crefname{matrix}{Equation}{Equations}
\creflabelformat{matrix}{#2(#1)#3}
\newcounter{matrix}
\renewcommand*{\thematrix}{M\arabic{matrix}}
\makeatletter
\def\@equationname{equation}
\newenvironment{m}[1]{%
\def\mymathenvironmenttouse{#1}%
\ifx\mymathenvironmenttouse\@equationname%
\refstepcounter{matrix}%
\else
\patchcmd{\@arrayparboxrestore}{equation}{matrix}{}{}% doesn't change output?
\patchcmd{\print@eqnum}{equation}{matrix}{}{}%
\patchcmd{\incr@eqnum}{equation}{matrix}{}{}%
% \def\print@eqnum{\tagform@\thematrix}% instead of etoolbox' \pathcmd
% \def\incr@eqnum{\refstepcounter{matrix}\let\incr@eqnum\@empty}% instead of etoolbox' \pathcmd
\fi
\csname\mymathenvironmenttouse\endcsname%
}{%
\ifx\mymathenvironmenttouse\@equationname%
\tag{\thematrix}%
\fi
\csname end\mymathenvironmenttouse\endcsname%
}
\makeatother
\begin{document}
\begin{equation} \label{eq:2}
y = x
\end{equation}
%
The next matrix equation is \cref{eq:m1}.
\begin{m}{equation}
y = \sqrt x \label{eq:m1}
\end{m}
%
\begin{align}
\alpha &= \beta \label{eq:1} \\
\delta &= \gamma \label{eq:4}
\end{align}
%
The previous standard equation is \cref{eq:2} and align is \cref{eq:1,eq:4}.
The next matrix equations (align) are \cref{eq:m2,eq:m3}.
\begin{m}{align}
y &= \sqrt x \label{eq:m2} \\
z &= y^2 \label[equation]{eq:m3}
\end{m}
%
\begin{m}{alignat}{3}
y & = \sqrt x & \quad y^2 &= x & \quad z &= c \label[equation]{eq:m4} \\
p & = q/r & & & & \label{eq:m5}
\end{m}
The previous matrix equations (alignat) are \cref{eq:m4,eq:m5}.
\end{document}
