cluster
子圖是否為叢集
類型：bool，預設值：false
子圖叢集的渲染方式不同，例如 dot 會在子圖叢集周圍繪製一個方框，但不會在非子圖叢集周圍繪製方框。
範例
digraph cats {
subgraph cluster_big_cats {
// This subgraph is a cluster, because the name begins with "cluster"
"Lion";
"Snow Leopard";
}
subgraph domestic_cats {
// This subgraph is also a cluster, because cluster=true.
cluster=true;
"Siamese";
"Persian";
}
subgraph not_a_cluster {
// This subgraph is not a cluster, because it doesn't start with "cluster",
// nor sets cluster=true.
"Wildcat";
}
}- 叢集
- 子圖