Springer 书籍专著类中的子图出现错误（但可以工作）

Question

我正在使用 Springer 的 latex 文件创建一本专著。模板可以在这里找到：

https://www.springer.com/gp/authors-editors/book-authors-editors/your-publication-journey/manuscript-preparation

尝试使用子图时，文档按预期编译，但出现错误：环境子图未定义。这是我正在使用的代码（顺便说一下，在 Overleaf 中）：

%%%%%%%%%%%%%%%%%%%% book.tex %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% sample root file for the chapters of your "monograph"
%
% Use this file as a template for your own input.
%
%%%%%%%%%%%%%%%% Springer-Verlag %%%%%%%%%%%%%%%%%%%%%%%%%%


% RECOMMENDED %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass[graybox,envcountchap,sectrefs]{svmono}

% choose options for [] as required from the list
% in the Reference Guide

%\usepackage{mathptmx}
%\usepackage{helvet}
%\usepackage{courier}
%
\usepackage{type1cm}         

\usepackage{makeidx}         % allows index generation
\usepackage{graphicx}        % standard LaTeX graphics tool
                             % when including figure files
\usepackage{multicol}        % used for the two-column index
\usepackage[bottom]{footmisc}% places footnotes at page bottom

\usepackage{newtxtext}       % 
\usepackage[varvw]{newtxmath}       % selects Times Roman as basic font

% see the list of further useful packages
% in the Reference Guide

\makeindex             % used for the subject index
                       % please use the style svind.ist with
                       % your makeindex program

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\chapter{Chapter Heading}

\begin{figure}[!htb]
\begin{subfigure}
\includegraphics[width=.45\textwidth]{figure}
\end{subfigure}
\begin{subfigure}
\includegraphics[width=.45\textwidth]{figure}
\end{subfigure}
\caption{Some random caption}
\label{fig1}
\end{figure}

\end{document}

我尝试使用 subcaption 包，但这会删除所有图形标题的格式。有人可以提供一些如何解决这个问题的提示吗？

Answer 1

caption和软件包subcaption与 不兼容svmono。但是subfig，只要您使用caption=false选项加载它，就可以。

%%%%%%%%%%%%%%%%%%%% book.tex %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% sample root file for the chapters of your "monograph"
%
% Use this file as a template for your own input.
%
%%%%%%%%%%%%%%%% Springer-Verlag %%%%%%%%%%%%%%%%%%%%%%%%%%


% RECOMMENDED %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass[graybox,envcountchap,sectrefs]{svmono}

% choose options for [] as required from the list
% in the Reference Guide

%\usepackage{mathptmx}
%\usepackage{helvet}
%\usepackage{courier}
%
%\usepackage{type1cm}        % don't use it
\usepackage[T1]{fontenc}

\usepackage{makeidx}         % allows index generation
\usepackage{graphicx}        % standard LaTeX graphics tool
                             % when including figure files
\usepackage{multicol}        % used for the two-column index
\usepackage[bottom]{footmisc}% places footnotes at page bottom

\usepackage{newtxtext}       % 
\usepackage[varvw]{newtxmath}       % selects Times Roman as basic font

% see the list of further useful packages
% in the Reference Guide
\usepackage[caption=false]{subfig}

\makeindex             % used for the subject index
                       % please use the style svind.ist with
                       % your makeindex program

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\chapter{Chapter Heading}

\begin{figure}[!htbp]
\subfloat[Subcaption]{\includegraphics[width=.45\textwidth]{example-image}}
\quad
\subfloat[]{\includegraphics[width=.45\textwidth]{example-image}}
\caption{Some random caption}
\label{fig1}
\end{figure}

\end{document}

我添加了子标题（一个为空，仅作为示例。

如果您不需要副标题或者至少不需要字母，只需将图像放置在您想要的位置：

\begin{figure}[!htb]
\includegraphics[width=.45\textwidth]{example-image}\quad
\includegraphics[width=.45\textwidth]{example-image}
\caption{Some random caption}
\label{fig1}
\end{figure}