tikz：绘制箭头

Question

我怎样才能使左侧垂直箭头样式与右侧相同？

\documentclass[tikz,border=3.14mm]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[->] (0,3) -- (0,0)
  node[below] {$0$} -- (3,0) node[midway,below] {$x_A$}
 node[below] {$1$} -- (3,3);
 \draw[red,thick] (0,1) -- (3,2);
 \path (1,0.5) node {liquido} (2,2.5) node {vapore};
\end{tikzpicture}
\end{document}

先感谢您

Answer 1

您在一条路径中绘制整个轴系统。->仅在路径的一端添加箭头。因此，您需要<->在两端添加两个箭头。

\documentclass[tikz,border=1]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[<->] (0,3) -- (0,0)
  node[below] {$0$} -- (3,0) node[midway,below] {$x_A$}
 node[below] {$1$} -- (3,3);
 \draw[red,thick] (0,1) -- (3,2);
 \path (1,0.5) node {liquido} (2,2.5) node {vapore};
\end{tikzpicture}
\end{document}