graphviz 改变有向图中特定形状的方向

Question

如何使用 graphviz 点语言将所有 "parallelogram" [查看我的代码] 放在 S 框的顶部？

所以基本上输出应该看起来像一条直线，所有 M1 M2 和 Mn 都在图的顶部。

实际输出：期望的输出：

digraph ER {

node [group=M; shape=parallelogram]; M1; M2; M_n;
node [group=I, shape=none]; "...";
node [group=V, shape=egg]; IV; V1; V2;
node [group=C, shape=box]; "S1";  "S2";  "S_n"; f;
node [group=F, shape=hexagon]; "FINAL";


    IV -> "S1";
    M1 -> "S1";
    "S1" -> V1;
    V1 -> "S2";
    M2 -> "S2";
    "S2" -> V2;
    V2 -> "...";
    "..." -> "S_n";
    M_n -> "S_n";
    "S_n" -> f;
    f -> "FINAL"

    rankdir=LR;
}

Answer 1

与rank attribute allows constraining two (or more) nodes of the same subgraph同级。考虑到这一点：

digraph ER {

rankdir=LR;

node [shape=none]; "...";
node [shape=egg]; IV; V1; V2;
node [shape=box]; f;
{rank=same; "S1"; M1[shape=parallelogram];}
{rank=same; "S2"; M2[shape=parallelogram];}
{rank=same; "S_n"; M_n[shape=parallelogram];}
node [shape=hexagon]; "FINAL";

    IV -> "S1";
    M1 -> "S1";
    "S1" -> V1;
    V1 -> "S2";
    M2 -> "S2";
    "S2" -> V2;
    V2 -> "...";
    "..." -> "S_n";
    M_n -> "S_n";
    "S_n" -> f;
    f -> "FINAL"

}

graphviz 改变有向图中特定形状的方向

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