我创建了 4 张 TikZ 图片，并使用该subcaption包来获得 4 张图片的 2x2 图形。但是，右上角的图形与其他图形完全不对齐，我不明白为什么。
这是我的代码：
\documentclass[12pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{makeidx}
\usepackage{graphicx}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\usepackage{subcaption}
\usepackage{tikz}
\usetikzlibrary{patterns}
\begin{document}
\begin{figure}
\begin{subfigure}[b]{0.35\textwidth}
\centering
\resizebox{\linewidth}{!}{
\begin{tikzpicture}[scale=5]
% Define useful points for colouring (colouring first)
\coordinate (H1) at (0,0.9);
\coordinate (H2) at (0.1,0.8);
\coordinate (H3) at (0.8,0.1);
\coordinate (H4) at (0.9,0);
\coordinate (INTER) at (0.465,0.4);
\coordinate (T1) at (0,0.4);
\coordinate (T2) at (1,0.4);
% Colouring (0,0)
\fill[color=blue!10]
(T1) -- (T2) -- (1,1) -- (0,1) -- cycle;
% Box and labels
\draw (0,0) -- (1,0) -- (1,1) -- (0,1) -- (0,0);
\draw (0,1) node[left]{$\theta$};
\draw (1,0) node[below]{$s$};
% h^(-1) curve
\draw (0,0.9) to[bend left = 5] (0.1,0.8);
\draw (0.1,0.8) to[bend right = 5] (0.8,0.1);
\draw (0.8,0.1) to[bend left = 5] (0.9,0);
\draw (0.13,0.6) node {$h^{-1}(\cdot)$};
% \t hat line
\draw[dashed] (0,0.4) -- (1,0.4);
\draw (0,0.4) node[left] {$\hat{\theta}$};
% s hat line
\draw (0.465,1) -- (0.465,0);
\draw (0.465,0) node[below] {$\hat{s}$};
\end{tikzpicture}
}
\caption{$(x_{1},x_{2}) = (0,0)$}
\label{fig:subfigA}
\end{subfigure}
\begin{subfigure}[b]{0.35\textwidth}
\centering
\resizebox{\linewidth}{!}{
\begin{tikzpicture}[scale=5]
% Define useful points for colouring
\coordinate (H1) at (0,0.9);
\coordinate (H2) at (0.1,0.8);
\coordinate (AxH2) at (0.1,1);
\coordinate (H3) at (0.8,0.1);
\coordinate (H4) at (0.9,0);
\coordinate (INTER) at (0.465,0.4);
\coordinate (AxINTER) at (0.465,1);
\coordinate (T1) at (0,0.4);
\coordinate (T2) at (1,0.4);
% Colouring (1,0)
\fill[color=blue!10]
(0,0.9) to[bend left = 5] (0.1,0.8) -- (AxH2) -- (0,1) -- cycle;
\fill[color=blue!10]
(0.1,0.8) to[bend right = 5] (0.8,0.1) -- (T2) -- (1,1) -- (AxH2) -- cycle;
\fill[color=white]
(INTER) to[bend right = 5] (0.8,0.1) -- (T2) -- cycle;
% Box and labels
\draw (0,0) -- (1,0) -- (1,1) -- (0,1) -- (0,0);
\draw (0,1) node[left]{$\theta$};
\draw (1,0) node[below]{$s$};
% h^(-1) curve
\draw (0,0.9) to[bend left = 5] (0.1,0.8);
\draw (0.1,0.8) to[bend right = 5] (0.8,0.1);
\draw (0.8,0.1) to[bend left = 5] (0.9,0);
\draw (0.13,0.6) node {$h^{-1}(\cdot)$};
% \t hat line
\draw[dashed] (0,0.4) -- (1,0.4);
\draw (0,0.4) node[left] {$\hat{\theta}$};
% s hat line
\draw (0.465,1) -- (0.465,0);
\draw (0.465,0) node[below] {$\hat{s}$};
\end{tikzpicture}
}
\caption{$(x_{1},x_{2}) = (1,0)$}
\label{fig:subfigB}
\end{subfigure}
\begin{subfigure}[b]{0.35\textwidth}
\centering
\resizebox{\linewidth}{!}{
\begin{tikzpicture}[scale=5]
% Define useful points for colouring
\coordinate (H1) at (0,0.9);
\coordinate (H2) at (0.1,0.8);
\coordinate (AxH2) at (0.1,1);
\coordinate (H3) at (0.8,0.1);
\coordinate (AxH3) at (0.8,1);
\coordinate (H4) at (0.9,0);
\coordinate (INTER) at (0.465,0.4);
\coordinate (AxINTER) at (0.465,1);
\coordinate (T1) at (0,0.4);
\coordinate (T2) at (1,0.4);
% Colouring (0,1)
\fill[color=blue!10]
(H2) to[bend right = 5] (H3) -- (AxH3) -- (AxH2) -- cycle;
\fill[color=blue!10]
(H3) to[bend left = 5] (H4) -- (1,1) -- (AxH3) -- cycle;
\fill[color=blue!10]
(H4) to[bend left = 5] (H4) -- (1,1) -- (AxH3) -- cycle;
\fill[color=blue!10]
(H4) -- (1,0) -- (1,1) -- cycle;
\fill[color=blue!10]
(0,1) -- (0,0.4) -- (1,0.4) -- (1,1) -- cycle;
% Box and labels
\draw (0,0) -- (1,0) -- (1,1) -- (0,1) -- (0,0);
\draw (0,1) node[left]{$\theta$};
\draw (1,0) node[below]{$s$};
% h^(-1) curve
\draw (0,0.9) to[bend left = 5] (0.1,0.8);
\draw (0.1,0.8) to[bend right = 5] (0.8,0.1);
\draw (0.8,0.1) to[bend left = 5] (0.9,0);
\draw (0.13,0.6) node {$h^{-1}(\cdot)$};
% \t hat line
\draw[dashed] (0,0.4) -- (1,0.4);
\draw (0,0.4) node[left] {$\hat{\theta}$};
% s hat line
\draw (0.465,1) -- (0.465,0);
\draw (0.465,0) node[below] {$\hat{s}$};
\end{tikzpicture}
}
\caption{$(x_{1},x_{2}) = (0,1)$}
\label{fig:subfigC}
\end{subfigure}
\begin{subfigure}[b]{0.35\textwidth}
\centering
\resizebox{\linewidth}{!}{
\begin{tikzpicture}[scale=5]
% Define useful points for colouring
\coordinate (H1) at (0,0.9);
\coordinate (H2) at (0.1,0.8);
\coordinate (AxH2) at (0.1,1);
\coordinate (H3) at (0.8,0.1);
\coordinate (AxH3) at (0.8,1);
\coordinate (H4) at (0.9,0);
\coordinate (INTER) at (0.465,0.4);
\coordinate (AxINTER) at (0.465,1);
\coordinate (T1) at (0,0.4);
\coordinate (T2) at (1,0.4);
% Colouring (1,1)
\fill[color=blue!10]
(0,0.9) to[bend left = 5] (0.1,0.8) -- (AxH2) -- (0,1) -- cycle;
\fill[color=blue!10]
(H2) to[bend right = 5] (H3) -- (AxH3) -- (AxH2) -- cycle;
\fill[color=blue!10]
(H3) to[bend left = 5] (H4) -- (1,1) -- (AxH3) -- cycle;
\fill[color=blue!10]
(H4) to[bend left = 5] (H4) -- (1,1) -- (AxH3) -- cycle;
\fill[color=blue!10]
(H4) -- (1,0) -- (1,1) -- cycle;
% Box and labels
\draw (0,0) -- (1,0) -- (1,1) -- (0,1) -- (0,0);
\draw (0,1) node[left]{$\theta$};
\draw (1,0) node[below]{$s$};
% h^(-1) curve
\draw (0,0.9) to[bend left = 5] (0.1,0.8);
\draw (0.1,0.8) to[bend right = 5] (0.8,0.1);
\draw (0.8,0.1) to[bend left = 5] (0.9,0);
\draw (0.13,0.6) node {$h^{-1}(\cdot)$};
% \t hat line
\draw[dashed] (0,0.4) -- (1,0.4);
\draw (0,0.4) node[left] {$\hat{\theta}$};
% s hat line
\draw (0.465,1) -- (0.465,0);
\draw (0.465,0) node[below] {$\hat{s}$};
\end{tikzpicture}
}
\caption{$(x_{1},x_{2}) = (1,1)$}
\label{fig:subfigD}
\end{subfigure}
\label{fig:EqLemma}
\end{figure}
\end{document}
编译的结果是：
我检查了许多相关问题，但没有发现任何类似的问题（但我首先犯了一个经典错误，在子图环境之间放置了一个空行......）。
答案1
为了解决这个问题，你应该做两件事：
\\在第二个和第三个子图之间添加换行符。- 然后（因为这会改变整个图形的水平对齐方式），
\centering在下方添加\begin{figure}。
您的代码中的内容如下：
\documentclass{article}
\usepackage{graphicx}
\usepackage{subcaption}
\begin{document}
\begin{figure}
\centering % <-- add this
\begin{subfigure}[b]{0.35\textwidth}
% your figure here
\end{subfigure}
\begin{subfigure}[b]{0.35\textwidth}
% your figure here
\end{subfigure}
\\ % <-- add this
\begin{subfigure}[b]{0.35\textwidth}
% your figure here
\end{subfigure}
\begin{subfigure}[b]{0.35\textwidth}
% your figure here
\end{subfigure}
\end{figure}
\end{document}
该错误与 TikZ 无关，如果您使用示例图像代替 TikZ 图片，仍会发生该错误。