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Question

我的问题如下。我想在 spy 的放大区域上绘制（放大的）轴。例如，以下示例（来自 pgfplots.pdf，第 121 页）：

% Preamble: \pgfplotsset{width=7cm,compat=1.5.1}
% requires \usetikzlibrary{spy} 
\begin{tikzpicture}[spy using outlines=
{circle, magnification=6, connect spies}]
\begin{axis}[no markers,grid=major,
every axis plot post/.append style={thick}]
\addplot  coordinates
{(0, 0.0) (0, 0.9) (1, 0.9) (2, 1) (3, 0.9) (80, 0)};
\addplot +[line join=round] coordinates
{(0, 0.0) (0, 0.9) (2, 0.9) (3, 1) (4, 0.9) (80, 0)};
\addplot +[line join=bevel] coordinates
{(0, 0.0) (0, 0.9) (3, 0.9) (4, 1) (5, 0.9) (80, 0)};
\addplot +[miter limit=5] coordinates
{(0, 0.0) (0, 0.9) (4, 0.9) (5, 1) (6, 0.9) (80, 0)};
\coordinate (spypoint) at (axis cs:3,1);
\coordinate (magnifyglass) at (axis cs:60,0.7);
\end{axis}
\spy [blue, size=2.5cm] on (spypoint)
in node[fill=white] at (magnifyglass);
\end{tikzpicture}

我想在放大镜中绘制轴（带有新网格）以（近似地）查看（x，y）中的峰值。有点像 DataGraph 软件中的“放大镜”工具。这可能吗？

Answer 1

评论

使用Christian Feuersänger 链接的问题，我能够举一个例子。

代码

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\pgfplotsset{width=7cm,compat=1.5.1}
\usetikzlibrary{spy}
\begin{document}
\begin{tikzpicture}[every pin/.style={fill=white}]
    \begin{axis}[
            no markers,
            grid=major,
            every axis plot post/.append style={thick}
        ]
        \addplot  coordinates {(0, 0.0) (0, 0.9) (1, 0.9) (2, 1) (3, 0.9) (80, 0)};
        \addplot +[line join=round] coordinates {(0, 0.0) (0, 0.9) (2, 0.9) (3, 1) (4, 0.9) (80, 0)};
        \addplot +[line join=bevel] coordinates {(0, 0.0) (0, 0.9) (3, 0.9) (4, 1) (5, 0.9) (80, 0)};
        \addplot +[miter limit=5] coordinates {(0, 0.0) (0, 0.9) (4, 0.9) (5, 1) (6, 0.9) (80, 0)};
        \coordinate (spypoint) at (axis cs:3,1);
    \end{axis}
    \node[pin={[pin distance=1.5cm]357:{%
        \begin{tikzpicture}[baseline,trim axis left,trim axis right]
            \begin{axis}[
                    no markers,
                    grid=major,
                    every axis plot post/.append style={thick},
                    tiny,
                    xmin=1,xmax=6,
                    ymin=0.95,ymax=1.02,
                ]
                \addplot  coordinates {(0, 0.0) (0, 0.9) (1, 0.9) (2, 1) (3, 0.9) (80, 0)};
                \addplot +[line join=round] coordinates {(0, 0.0) (0, 0.9) (2, 0.9) (3, 1) (4, 0.9) (80, 0)};
                \addplot +[line join=bevel] coordinates {(0, 0.0) (0, 0.9) (3, 0.9) (4, 1) (5, 0.9) (80, 0)};
                \addplot +[miter limit=5] coordinates {(0, 0.0) (0, 0.9) (4, 0.9) (5, 1) (6, 0.9) (80, 0)};
            \end{axis}
        \end{tikzpicture}%
    }},draw,circle,minimum size=0.5cm] at (spypoint) {};
\end{tikzpicture}
\end{document}

输出