我正在尝试使用 spy 来放大一个包含大量不同比例的图。但是当我放大时，图看起来并不像预期的那样。它看起来有点像素化。知道为什么吗？如何解决这个问题？
放大后的内部图看起来应该是这样的
但它看起来像这样：
以下是我的 tex 文件：
\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\pgfplotsset{every axis legend/.append style={%
cells={anchor=west}}
}
\usetikzlibrary{arrows}
\tikzset{>=stealth'}
\usetikzlibrary{spy}
\definecolor{m1_color}{HTML}{9BFF85}
\definecolor{m2_color}{HTML}{BC86D1}
\begin{document}
\begin{tikzpicture}[]
\begin{scope}[spy using outlines={rectangle, magnification=100,
width=3cm,height=4cm,connect spies}]
\begin{axis}[
legend style = {at={(1.05,1.0)}, anchor=north west},
ylabel = {$x_2$},
title = {Sets},
xlabel = {$x_1$},
width=8cm, height=8cm
]
\addplot+[
mark = {none},
red, dashed
] coordinates {
(-0.2617, -4000.0)
(-0.2617, 4000.0)
};
\addlegendentry{{}{Set}}
\addplot+[
solid, m1_color, mark=none, fill=m1_color
] coordinates {
(1.2, 0.2)
(1.0, 0.2)
(1.0, -8.32667268468867e-17)
(1.2, -8.32667268468867e-17)
(1.2, 0.2)
};
\addlegendentry{{}{M1}}
\addplot+[
solid, m2_color, mark=none, fill=m2_color
] coordinates {
(1.2, 0.2)
(1.0, 0.2)
(1.0, -8.32667268468867e-17)
(1.2, -8.32667268468867e-17)
(1.2, 0.2)
};
\addlegendentry{{}{M2}}
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solid, m2_color, mark=none, fill=m2_color, fill opacity=0.5
] coordinates {
(1.0, -0.265972863900861)
(1.0, -0.456228776570086)
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(1.22, -0.238084931713074)
(1.22, -0.0478290190439142)
(1.01999999999999, -0.0659728639009378)
(1.0, -0.265972863900861)
};
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solid, m1_color, mark=none, fill=m1_color
] coordinates {
(1.0000000000000002, -0.33518225819442576)
(1.22, -0.33518225819442576)
(1.22, -0.17021742804955514)
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(1.0000000000000002, -0.33518225819442576)
};
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(0.954377122342992, -0.522007062932457)
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\coordinate (point) at (axis cs:0,0);
\coordinate (spy point) at (axis cs:400,0.8);
\spy on (point) in node (spy) at (spy point);
\end{axis}
\end{scope}
\end{tikzpicture}
\end{document}
答案1
在我看来（这值得我仔细研究一下）我们在这里达到了 TeX 和 TikZ 的极限。
由于轴环境240x207 pt默认测量（约8.4 x 7.3 cm）。您已选择放大倍数100，并使用间谍（显示放大倍数的节点）4cm by 3 cm，即约。114pt by 85 pt乘以 100，因此此节点必须将原始图形上的面积扩大约一 pt（115/100 pt and 85/100 pt）。
因此就出现了像素化。