请问如何画长箭头？

Question

我是 LaTex 的初学者。

这样的长箭头怎样画？

Answer 1

由于您是新手：

\documentclass[border=3.141592]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows.meta,
                decorations.pathreplacing,%
                    calligraphy,% had to be loaded after decorations.pathreplacing
                positioning}

\begin{document}
    \begin{tikzpicture}[
            > = Straight Barb,
node distance = 8mm and 24mm,
    BC/.style = {% Brace Calligraphic
        decorate,
        decoration={calligraphic brace, 
                    raise=3pt, amplitude=6pt},
                    very thick, pen colour={black}
                },
   dot/.style = {circle, fill, inner sep=2pt, outer sep=0pt},
every label/.append style = {align=center}
                    ]
\draw[thick,->] (0,0) -- (8.8,0);
\node (a) [dot,label=below:text\\here] at (2.2,0) {};
\node (b) [dot,label=below:text\\here,
           right=of a] {};
\node (c) [dot,label=above:text\\here,
           right=of b] {};
%
\draw[BC]   (a.north) -- node[above=9pt] {text here} (b.north);
\draw[->]   (c) -- ++ (0,1.1) node[above] {text here};           
    \end{tikzpicture}
\end{document}

结论：

正如 @jsbibra 在下面的评论中指出的那样。OP 可能想减少\baselineskip距离，即文本行之间的距离。这可以通过 determine 来更改\linespread。例如，使用

    \begin{tikzpicture}[
            > = Straight Barb,
node distance = 8mm and 24mm,
    BC/.style = {% Brace Calligraphic
        decorate,
        decoration={calligraphic brace,
                    raise=3pt, amplitude=6pt},
                    very thick, pen colour={black}
                },
   dot/.style = {circle, fill, inner sep=2pt, outer sep=0pt},
every label/.append style = {align=center},
        font = \linespread{0.84}\selectfont % <-----------
                    ]
% image code

图像变成：