如何优化GraphViz输出宽度?

问题描述

我制作的图形具有很大的宽度比:它们的尺寸为51706 x 503像素.如何告诉GraphViz优化宽度?

I make graphs that have huge width ratio: they are 51706 x 503 pixels in size.How can I tell GraphViz to optimize width ?

注1:图实际上是一棵树，每个节点都有很多子代.这里是一个.

Note 1: the graph is in fact a tree with each node having a lot of children.Here is a sample.

注2:我认为我使用点:)

Note 2: I think I use dot :)

注意3:这是 Ruby代码

def graph_node(n, parent=nil, depth=0)
  #print n, " "
  gn = @g.add_node(n.object_id.to_s, :label=>n.to_graphviz, :shape=>"Mrecord")
  if parent
    e = @g.add_edge(parent, gn)
  end
  if n == @current_pos_node
    gn[:color] = "brown3"
    gn[:style] = "filled"
  elsif @s.tree.pv(@current_pos_node).include?(n)
    gn[:color] = "cadetblue"
    gn[:style] = "filled"
  elsif @s.tree.pv(@root).include?(n)
    gn[:color] = "yellow"
    gn[:style] = "filled"
  end
  return if !n.children # or depth == 2
  i = 0
  for c in n.children
    graph_node(c, gn, depth+1)
    i += 1
    #break if i > 2
  end
end

def graph(name="tree", root_node=@current_pos_node)
  @g = GraphViz::new("G")
  #@g['sep'] = "10,100"
  #@g["overlap"] = "compress"
  #@g["rankdir"] = "BT"
  #@g["ratio"] = "0.9"
  @g["size"] = "350,500"
  graph_node(root_node)
  @g.output(:svg => "#{name}.svg")
end

推荐答案

如果图形由未连接的几棵树组成，则可以将它们拆分(如)

In case the graph consists of several trees which are not connected, you could split them up (as mentioned in Graphviz: break flat but sparsely connected graph into multiple rows?)

根据您的特定图形，使用时可能会获得较小的图形

Depending on your particular graph, you may obtain a smaller graph when using

ratio="compress"

(不过，您必须指定size)

要对特定图形进行详细的优化，可以添加rank属性，并手动将节点分布在不同的等级上.

For detailed optimizations on a specific graph, you may add rank attributes and distribute the nodes manually on different ranks.

有一个称为 取消展开 的graphviz工具.似乎正是为此目的而存在的:

There is a graphviz tool called unflatten which seems to exist exactly for this purpose :

不需要使用它，但我认为值得尝试.

Never had the need to use it, but I think it's worth a try.

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