我有一个生成随机图(DAG)的程序,如何提取输出图并转换为文件点格式,以便在GraphViz中将其可视化?还是有另一种方法? 这是代码(我已经省略了所有依赖项)和一个简单的生成的输出
public class DigraphGenerator {
private static final class Edge implements Comparable<Edge> {
private final int v;
private final int w;
private Edge(int v, int w) {
this.v = v;
this.w = w;
}
public int compareTo(Edge that) {
if (this.v < that.v) return -1;
if (this.v > that.v) return +1;
if (this.w < that.w) return -1;
if (this.w > that.w) return +1;
return 0;
}
}
private DigraphGenerator() { }
public static Digraph dag(int V, int E) {
if (E > (long) V*(V-1) / 2) throw new IllegalArgumentException("Too many edges");
if (E < 0) throw new IllegalArgumentException("Too few edges");
Digraph G = new Digraph(V);
SET<Edge> set = new SET<Edge>();
int[] vertices = new int[V];
for (int i = 0; i < V; i++)
vertices[i] = i;
StdRandom.shuffle(vertices);
while (G.E() < E) {
int v = StdRandom.uniform(V);
int w = StdRandom.uniform(V);
Edge e = new Edge(v, w);
if ((v < w) && !set.contains(e)) {
set.add(e);
G.addEdge(vertices[v], vertices[w]);
}
}
return G;
}
public static void main(String[] args) {
int V = Integer.parseInt(args[0]);
int E = Integer.parseInt(args[1]);
StdOut.println("DAG");
StdOut.println(dag(V, E));
StdOut.println();
}
}
输出示例:
DAG 12个顶点,10个边 0:2 1 1: 2: 3: 4:8 5:9 6: 7:8 4 8: 9:8 10:5 11:5 6
DAG 12个顶点,10个边 0:8 1:8 2:5 3: 4:5 5: 6:7 9 8 7: 8: 9: 10: 11:5 7 3
答案 0 :(得分:0)
类似的东西应该可以工作:
void writeDot(Digraph d){
try(BufferedWriter out=new BufferedWriter(new OutputStreamWriter(new FileOutputStream("g.dot")))){
out.write("digraph {");
out.newLine();
for(Edge e:d.getEdges()){
out.write(e.v+" -> "+e.w);
out.newLine();
}
out.write("}");
}
}
或者您可以看看https://github.com/nidi3/graphviz-java,它负责生成点文件并调用graphviz并直接生成png图像。