没有已知名为 X 的形状

Question

我正在尝试使用 pgfplots 创建一个 tikz 图片，该图片具有 tkz-euclide 包的角度。 然而，经过千辛万苦，我无法编译乳胶文档。

我尝试更改路径内的参数。 似乎什么都不起作用。 去掉kzMarkAnglesize=0.5cm,mark=|；线将允许代码工作，但角度显然不会显示。

\begin{figure}[ht]
\begin{center}
    \tikzset{every picture/.style={xscale=1,yscale=1}}
\begin{tikzpicture}
    \begin{axis}[
    domain=0:8,
    xmin=0, xmax=8,
    ymin=0, ymax=8,
    samples=400,
    yticklabels={,,},
    xticklabels={,,},
    ticks=none,
    axis y line=center,
    axis x line=middle,
    xscale=2, yscale=1.5,
    clip=false,
    ]
    \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates
    {(0,3) (8,7)};
    \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates
    {(6,6) (8,6)};
    \path
        (8,7)node(A){}
        (6,6)node(B){}
        (8,6)node(C){};
    \tkzMarkAngle[size=0.5cm,mark=|](A,B,C);    
    \node[label={180:{$\theta_H$}},circle,fill,inner sep=0pt] at (axis cs:0,3) {};
    \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates
    {(0,1) (8,3)};
    \node[label={180:{$\theta_L$}},circle,fill,inner sep=0pt] at (axis cs:0,1) {};
    \end{axis}
\end{tikzpicture}
\end{center}
\end{figure}

错误：没有已知名为 B 的形状

这是一个最小的工作示例（根据要求）：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{pgfplots}
\pgfplotsset{compat=1.11}
\usepackage{tkz-euclide}
\usepackage{tikz}
\usetkzobj{all}

\begin{document}
\begin{figure}[ht]
\begin{center}
\tikzset{every picture/.style={xscale=1,yscale=1}}
\begin{tikzpicture}
    \begin{axis}[
    domain=0:8,
    xmin=0, xmax=8,
    ymin=0, ymax=8,
    samples=400,
    yticklabels={,,},
    xticklabels={,,},
    ticks=none,
    axis y line=center,
    axis x line=middle,
    xscale=2, yscale=1.5,
    clip=false,
    ]
    \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates {(0,3) (8,7)};
    \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates {(6,6) (8,6)};
    \path
        (8,7)node(A){}
        (6,6)node(B){}
        (8,6)node(C){};
    \node[label={180:{$\theta_H$}},circle,fill,inner sep=0pt] at (axis cs:0,3) {};
    \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates {(0,1) (8,3)};
    \node[label={180:{$\theta_L$}},circle,fill,inner sep=0pt] at (axis cs:0,1) {};
    \end{axis}
\end{tikzpicture}
\end{center}
\end{figure}
\end{document}

Answer 1

两种解决方案。我更喜欢第二个。

解决方案1：

\tikzset{every picture/.style={xscale=1,yscale=1}}
\begin{tikzpicture}
    \begin{axis}[
        domain=0:8,
        xmin=0, xmax=8,
        ymin=0, ymax=8,
        samples=400,
        yticklabels={,,},
        xticklabels={,,},
        ticks=none,
        axis y line=center,
        axis x line=middle,
        xscale=2, yscale=1.5,
        clip=false,
        ]
        \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates
        {(0,3) (8,7)};
        \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates
        {(6,6) (8,6)};
        \coordinate (A) at (axis cs:8,7);
        \coordinate (B) at (axis cs:6,6);
        \coordinate (C) at (axis cs:8,6);
    
        \path pic[<->,draw=blue, angle radius=15mm, "$\alpha$", angle eccentricity=.8]{angle=C--B--A};
        \path pic[<->,draw=red,  angle radius=15mm, "$\theta$", angle eccentricity=.8,pic text options={shift={(10mm,15mm)}}]{angle=A--B--C};
     
        \node[label={180:{$\theta_H$}},circle,fill,inner sep=0pt] at (axis cs:0,3) {};
        \addplot+[thick, smooth, mark=none, color=black, width=0.1in] plot coordinates
        {(0,1) (8,3)};
        \node[label={180:{$\theta_L$}},circle,fill,inner sep=0pt] at (axis cs:0,1) {};
    \end{axis}

\end{tikzpicture}

解决方案2：

\begin{tikzpicture}[x=0.5cm,y=0.5cm]

    \coordinate (A) at (8,7);
    \coordinate (B) at (6,6);
    \coordinate (C) at (8,6);

    \draw[-latex](-0.2,0)--++(9,0)node[below]{$x$};
    \draw[-latex](0,-0.2)--++(0,9)node[left]{$y$};

    \draw[very thick] (0,3)--(A)node[pos=0,left]{$\theta_H$};
    \draw[very thick] (0,1)--(8,3)node[pos=0,left]{$\theta_L$};
    \draw[] (B)--(C);
    
    \path pic[<->,draw=blue,blue ,angle radius=8mm, "$\alpha$", angle eccentricity=1.3]{angle=C--B--A};
    \path pic[<->,draw=red,  angle radius=5mm, "$\theta$", angle eccentricity=1.0,pic text options={shift={(5mm,8mm)}}]{angle=A--B--C};

\end{tikzpicture}