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程序包 pgf 错误：未知箭头尖类型‘三角形 45’

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程序包 pgf 错误：未知箭头尖类型‘三角形 45’

现在我在 tikz 上遇到了一个问题。

\documentclass{article}

\usepackage{tikz}

\begin{document}


now I've an issues on tikz.

\begin{center}
\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1cm,y=1cm]
\clip(-4.263907326357041,-2.169808170515719) rectangle (4.512244003818671,1.5716037123486593);
\draw [line width=1pt] (-3,1)-- (0,0);
\draw [line width=1pt] (-3,-1)-- (0,0);
\draw [line width=1pt] (0,0)-- (3,0);
\draw [->,line width=1pt] (-3,1) -- (-1.47,0.49);
\draw [->,line width=1pt] (-3,-1) -- (-1.548,-0.516);
\draw [->,line width=1pt] (0,0) -- (2,0);
\draw (-2.076774358733703,1.5254134421898398) node[anchor=north west] {$X$};
\draw (-2.253451692101613,-0.8880281736084783) node[anchor=north west] {$Y$};
\draw (0.5629759052396007,-0.1110413040590908059) node[anchor=north west] {$S = X + Y$};
\end{tikzpicture}
\end{center}


\end{document}

答案1

你还没有说你想要什么输出，你可以删除

,>=triangle 45

并使用默认箭头，或添加

\usetikzlibrary{arrows}

在你的序言中，定义这种形式。

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