使用常规 pgfplots,您可以执行以下操作:用您选择的点画线并用节点标记它们。然后在轴坐标系中绘制附加距离标记\draw
(所有元素的具体位置可能需要调整)。
\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\tiny
\begin{axis}[
width = 6cm,
height = 4cm,
ymajorgrids = true,
ymin=-1,
ymax=7,
xmin=-6,
xmax=6,
xtick distance=1,
ytick distance=1,
axis y line*=center,
axis x line*=center,
enlarge x limits=.12
]
\addplot+[sharp plot] coordinates {(6,3) (1,4) (-4,5) } node[below=1mm, pos=0] {A(6,3)}
node[pos=0.45,below=1mm] {P(x,y)}
node[pos=1,below=1mm] {B(-4,5)};
\draw[|-|] (axis cs:1.2,5) -- node [above, rotate=-10] {m=13} (axis cs:6.3,3.9);
\draw[|-|] (axis cs:-3.8,6) -- node [above, rotate=-10, pos=.3] {n=2} (axis cs:1.2,5);
\end{axis}
\end{tikzpicture}
\end{document}
输出: