填充曲线下区域会导致对齐问题

Question

我正在尝试填充 sin(x)/x 曲线下的面积。这是我的代码：

\PassOptionsToPackage{usenames,dvipsnames,table,x11names}{xcolor}
\documentclass[a4paper, 12pt]{article}

\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{pgfplots}
\usepackage{tkz-euclide}
\pgfplotsset{compat=1.15}
\usetikzlibrary{arrows,shadows,positioning, calc, decorations.markings, hobby, quotes,angles,decorations.pathreplacing,intersections}
\usepgfplotslibrary{polar,colormaps,fillbetween}
\usepgflibrary{shapes.geometric}
\usepackage{xcolor}

\begin{document} 

\begin{figure}[ht]

\centering

\begin{tikzpicture}[scale=1.5,line width=1pt]
\begin{axis}[
color= black,
xmin=-1, 
xmax=7.9, 
ymin=-1, 
ymax=2, 
axis equal image, 
axis lines=middle, 
font=\scriptsize,
xtick distance=1,
ytick distance=1,
%xticklabels={}, 
%yticklabels={},
inner axis line style={stealth-stealth},
xlabel = {$x$},
ylabel = {$f(x)$},
ticks=none,
]

\addplot[black, opacity = 0, domain=0:10, name path = 1]{0};

\addplot[Tan, smooth, domain=0.01:7.5, samples = 300, name path=2, thick] {sin(deg(x))/x}; 

%\addplot[Tan, fill opacity=0.25] fill between [of=1 and 2,soft clip={domain=0:3.1415}];

\end{axis}
\end{tikzpicture} 

\caption{Integrating $\sin(x)/x$ from $0 \le x < \infty$.}
\label{1}

\end{figure}

\end{document}

我在一个更大的文档中有一个代码，因此这里是输出：

当我取消注释该行以填充该区域时，发生了以下情况：

存在明显的垂直间隙，并且图像被推到左侧。知道为什么会发生这种情况吗？

Answer 1

罪魁祸首是scale=1.5，您应该将其传递给axis，而不是tikzpicture。我猜测否则你会混淆pgfplots，看看这个答案如果你想得到一个核心层面的解释，恐怕我无法提供，但鉴于这个答案我的第一个猜测是改变 的位置scale，而且似乎有效。还请注意，pgfplots 库fillbetween会加载intersections，但这是一个稍微高级的版本，因此您不应该intersections（再次）加载。我还删除了tkz-euclide和 未使用的库（以保持代码整洁），但您可以重新使用它们，代码仍可正常工作。

\PassOptionsToPackage{usenames,dvipsnames,table,x11names}{xcolor}
\documentclass[a4paper, 12pt]{article}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{pgfplots}
%\usepackage{tkz-euclide}
\pgfplotsset{compat=1.15}
\usepgfplotslibrary{%polar,colormaps,
fillbetween}
% \usetikzlibrary{arrows,shadows,positioning, calc, decorations.markings, hobby, quotes,angles,decorations.pathreplacing}
% \usepgflibrary{shapes.geometric}
%\usepackage{xcolor}


\begin{document} 

\begin{figure}[ht]

\centering

\begin{tikzpicture}[line width=1pt]
\begin{axis}[scale=1.5,
color= black,
xmin=-1, 
xmax=7.9, 
ymin=-1, 
ymax=2, 
axis equal image, 
axis lines=middle, 
font=\scriptsize,
xtick distance=1,
ytick distance=1,
%xticklabels={}, 
%yticklabels={},
inner axis line style={stealth-stealth},
xlabel = {$x$},
ylabel = {$f(x)$},
ticks=none,
]
\addplot[black, opacity = 0, domain=0:10, name path = 1]{0};

\addplot[Tan, smooth, domain=0.01:7.5, samples = 300, name path=2, thick] {sin(deg(x))/x}; 

\addplot[Tan, fill opacity=0.25] fill between [of=1 and 2,soft clip={domain=0:3.1415}];

\end{axis}
\end{tikzpicture} 
\caption{Integrating $\sin(x)/x$ from $0 \le x < \infty$.}
\label{1}
\end{figure}
\end{document}