新环境和 tikz 的问题

Question

我想定义一个新环境，使 Tikz 中的图形更容易制作：

  \newenvironment{tikzc}[7]
  {\begin{center}
  \begin{tikzpicture}[scale=#1]
  \pgfmathsetmacro{\xmini}{#2};
  \pgfmathsetmacro{\xmaxi}{#3};
  \pgfmathsetmacro{\ymini}{#4};
  \pgfmathsetmacro{\ymaxi}{#5};
  \begin{axis}[xmin=\xmini,xmax=\xmaxi,ymin=\ymini,ymax=\ymaxi,axis lines=center, clip = false, xtick=\empty, ytick=\empty]
  \node[scale=0.1] (y) at (\xmini,\ymaxi){};
  \node[scale=0.1] (x) at (\xmaxi,\ymini){};
  \node[left= 0.09cm of x,scale=0.5] (xlabel) at ([yshift=-0.12cm]$(x)$){#6};
  \node[left= 0.04cm of y,scale=0.5] (ylabel) at ([yshift=-0.11cm]$(y)$){#7};
  }
  {\end{axis}
  \end{tikzpicture}
  \end{center}
  }

但我明白

“扫描使用 \path 时文件结束”为什么？

Answer 1

您的宏有效。因此，您可能向其输入了触发错误的某些内容。

\documentclass{article}

\usepackage{pgfplots}
\pgfplotsset{compat=1.15}
\usetikzlibrary{positioning,calc}

\newenvironment{tikzc}[7]
  {\begin{center}
  \begin{tikzpicture}[scale=#1]
  \pgfmathsetmacro{\xmini}{#2};
  \pgfmathsetmacro{\xmaxi}{#3};
  \pgfmathsetmacro{\ymini}{#4};
  \pgfmathsetmacro{\ymaxi}{#5};
  \begin{axis}[xmin=\xmini,xmax=\xmaxi,ymin=\ymini,ymax=\ymaxi,axis lines=center, clip = false, xtick=\empty, ytick=\empty]
  \node[scale=0.1] (y) at (\xmini,\ymaxi){};
  \node[scale=0.1] (x) at (\xmaxi,\ymini){};
  \node[left= 0.09cm of x,scale=0.5] (xlabel) at ([yshift=-0.12cm]$(x)$){#6};
  \node[left= 0.04cm of y,scale=0.5] (ylabel) at ([yshift=-0.11cm]$(y)$){#7};
  }
  {\end{axis}
  \end{tikzpicture}
  \end{center}
  }

\begin{document}

\begin{tikzc}{1}{0}{10}{0}{5}{$x$}{$y$}
        \addplot[very thick,red,domain=0:5] {0.04*x^2};
\end{tikzc}  
\end{document} 

编辑：将 移到\begin{document}之后\newenvironment...。