如何在乳胶上绘制加权图？

Question

我需要使用 LaTeX 绘制加权图，但我不知道如何将数字放在边缘上。这些数字就像每条边的成本。可以这样绘制图形：

\begin{tikzpicture}
\draw 
(1, 1) node[circle, black, draw](m){M}
(1, 3) node[circle, black, draw](i){I}
(1, 5) node[circle, black, draw](e){E}
(1, 7) node[circle, black, draw](a){A}
(3, 1) node[circle, black, draw](n){N}
(3, 3) node[circle, black, draw](j){J}
(3, 5) node[circle, black, draw](f){F}
(3, 7) node[circle, black, draw](b){B}
(5, 1) node[circle, black, draw](o){O}
(5, 3) node[circle, black, draw](k){K}
(5, 5) node[circle, black, draw](g){G}
(5, 7) node[circle, black, draw](c){C}
(7, 1) node[circle, black, draw](p){P}
(7, 3) node[circle, black, draw](l){L}
(7, 5) node[circle, black, draw](h){H}
(7, 7) node[circle, black, draw](d){D};

\draw[-] (a) -- (b);
\draw[-] (b) -- (c);
\draw[-] (c) -- (d);
\draw[-] (f) -- (g);
\draw[-] (g) -- (h);
\draw[-] (i) -- (j);
\draw[-] (j) -- (k);
\draw[-] (k) -- (l);
\draw[-] (m) -- (n);
\draw[-] (n) -- (o);
\draw[-] (o) -- (p);
\draw[-] (a) -- (e);
\draw[-] (b) -- (f);
\draw[-] (c) -- (g);
\draw[-] (d) -- (h);
\draw[-] (e) -- (i);
\draw[-] (f) -- (j);
\draw[-] (g) -- (k);
\draw[-] (i) -- (m);
\draw[-] (j) -- (n);
\draw[-] (k) -- (o);
\draw[-] (l) -- (p);

\end{tikzpicture}

Answer 1

您可以查看Tikz 示例以获取许多带注释的图示例（特别是，放置边标签的方法不止一种）。

添加边标签的一种快速方法是在您的路径上添加一个节点：

\draw[-] (a) -- node[above] {1} (b);

\begin{tikzpicture}
\draw 
(1, 1) node[circle, black, draw](m){M}
(1, 3) node[circle, black, draw](i){I}
(1, 5) node[circle, black, draw](e){E}
(1, 7) node[circle, black, draw](a){A}
(3, 1) node[circle, black, draw](n){N}
(3, 3) node[circle, black, draw](j){J}
(3, 5) node[circle, black, draw](f){F}
(3, 7) node[circle, black, draw](b){B}
(5, 1) node[circle, black, draw](o){O}
(5, 3) node[circle, black, draw](k){K}
(5, 5) node[circle, black, draw](g){G}
(5, 7) node[circle, black, draw](c){C}
(7, 1) node[circle, black, draw](p){P}
(7, 3) node[circle, black, draw](l){L}
(7, 5) node[circle, black, draw](h){H}
(7, 7) node[circle, black, draw](d){D};

\draw[-] (a) -- node[above] {1} (b);
\draw[-] (b) -- node[below] {2} (c);
\draw[-] (c) -- (d);
\draw[-] (f) -- (g);
\draw[-] (g) -- (h);
\draw[-] (i) -- (j);
\draw[-] (j) -- (k);
\draw[-] (k) -- (l);
\draw[-] (m) -- (n);
\draw[-] (n) -- (o);
\draw[-] (o) -- (p);
\draw[-] (a) -- (e);
\draw[-] (b) -- (f);
\draw[-] (c) -- (g);
\draw[-] (d) -- (h);
\draw[-] (e) -- (i);
\draw[-] (f) -- (j);
\draw[-] (g) -- (k);
\draw[-] (i) -- (m);
\draw[-] (j) -- (n);
\draw[-] (k) -- (o);
\draw[-] (l) -- (p);

\end{tikzpicture}