如何添加“无关”边缘

Question

我有这张图：

digraph G {
1 [label="car"];
2 [label="x"];
3 [label="car"];
4 [label="y"];
5 [label="cdr"];
6 [label="cdr"];
7 [label="cons"];
8 [label="x1"];
9 [label="x2"];
10 [label="cons"];
11 [label="y1"];
12 [label="y2"];
13 [label="f"];
14 [label="f"];
15 [label="car"];
16 [label="cdr"];
17 [label="car"];
18 [label="cdr"];
1 -> 2;
3 -> 4;
5 -> 2;
6 -> 4;
7 -> 8;
7 -> 9;
10 -> 11;
10 -> 12;
13 -> 2;
14 -> 4;
15 -> 7;
16 -> 7;
17 -> 10;
18 -> 10;
}

我想添加其他边缘：

1 -> 3 [style="dashed"];
2 -> 7 [style="dashed"];
3 -> 8 [style="dashed"];
4 -> 10 [style="dashed"];
5 -> 6 [style="dashed"];
6 -> 9 [style="dashed"];
7 -> 10 [style="dashed"];
8 -> 11 [style="dashed"];
9 -> 12 [style="dashed"];
13 -> 14 [style="dashed"];
15 -> 8 [style="dashed"];
16 -> 9 [style="dashed"];
17 -> 11 [style="dashed"];
18 -> 12 [style="dashed"];

但不改变布局。 我尝试将边缘权重设置为0，但它不起作用。

由于

Answer 1

您只需添加

即可

edge[constraint=false];

在添加无关的边缘之前。

不

边缘：

（似乎仍有一些小变化）