dot

问题 Is there any documentation (full pseudo code?) on the algorithm from dot within the Graphviz Library? I only found some partial pseudo code documentation. 回答1: Here are a few references for you. The most complete (short of the Graphviz source code itself) is probably #2, the paper "A Technique for Drawing Directed Graphs" which is written by several of the Graphviz contributors themselves. (1) "Drawing graphs with dot" In Drawing graphs with dot, dot's layout algorithm is described like this:

问题 I've got to do up a state space graph for my AI course, and I was hoping to use GraphViz to make it (so much faster than Dia). The one thing I can't seem to figure out how to do is how to do an "And" connection, which is basically an arc between two lines connecting to the same node. Is this possible? 回答1: Yes. While there's no explicit dot syntax for this, here's the way it's nearly always done: # just graph set-up digraph new_graph { ratio = "auto" mincross = 2.0 # draw some nodes "001"

问题 Is it possible to alter the following code to put Child_4 at the same horizontal level as Grandchild_0 (thereby pushing Grandchild_4 to its own level)? import networkx as nx import matplotlib.pyplot as plt G = nx.DiGraph() G.add_node("ROOT") for i in xrange(5): G.add_node("Child_%i" % i) G.add_node("Grandchild_%i" % i) G.add_edge("ROOT", "Child_%i" % i) G.add_edge("Child_%i" % i, "Grandchild_%i" % i) pos=nx.graphviz_layout(G,prog='dot') nx.draw(G,pos,arrows=False) plt.show() The above code

问题 I'm using pydot for parsing dot files in python. I can't find a way to parse comments present in the dot file itself, is there any way to do it? By just looking at the documentation I couldn't find any answer. Also, would you suggest a better parser for dot files (perhaps better maintained) than pydot ? Thanks 回答1: it is possible if you use the module json along with it like: import pydot import pyparsing import json graph = pydot.graph_from_dot_file(path) edgeList = graph.get_edge_list() for

问题 I'm attempting to implement a Decision Tree with scikit learn and then visualise the tree with Graphviz which I understand is the standard choice for visualising DT. I'm using PyCharm, anaconda, Python 2.7 and OS X El Capitan. I've installed pydot and Graphviz with PIP install as far as I can tell and have also installed them directly in Pycharm but whatever I do I continuously get a 'No module named graphviz'. from sklearn.datasets import load_iris from sklearn import tree #import graphviz

问题 I'm working with Graphviz on Mac but most of my apps run on servers with Ubuntu. I've noticed that dot-schemes with the same source code are drawn a bit differently when compiled on different operating systems. It seems to me that the main reason is the difference between fonts on the systems. Even though I use the same generic fonts and same sizes — they appear too different which affects the layout a lot. So the question is: is it possible to make fonts look identical in Graphviz schemes

问题 I am using Python on Mac OSX Leopard. I am trying to run the program 'dot' (part of Graphviz) from Python: # -*- coding: utf-8 -*- import os print os.environ['PATH'] print os.system("ls >> a.txt") print os.system("dot -o9.png -Tpng ./6.dot") The command "ls" is there just to make sure that python is in the correct directory. It is. The result that I get is: /usr/bin:/bin:/usr/sbin:/sbin 0 32512 My understanding is that 32512 error means that python could not find the file, and since the file

问题 I'm using Graphviz to represent arrays, using subgraphs and record nodes: subgraph cluster_array { label="my array" Array [shape="record", label="A | B | C | D"] Array } I would like to add external indices for each array elements, mapping 0 -> A , 1 -> B and so on. I want to achieve a result similar to: I've searched online and tried using xlabel but couldn't find a way to correctly add a label for each record element. I've also tried making the indices part of the label, and moving the

问题 I took the following steps to use Graphviz Dot mode in emacs: as per instructions at http://ppareit.github.io/graphviz-dot-mode/, added (load-file "PATH_TO_FILE/graphviz-dot-mode.el") to my .emacs file (C:/emacs/.emacs for me), and copied the text from http://www.graphviz.org/Misc/graphviz-dot-mode.el to a file in that path. in Emacs, created a new file (c-x c-f) and named it something.dot. Copied the DOT text from the aforementioned website, which became highlighted for dot syntax. Selected

问题 Is there a way to make this graphviz output looks like I am using subgraphs, to merge the 4 clusters with the tree graph 回答1: Googling found an answer: http://www.graphviz.org/content/subgraph-different-rankdir Essentially, subgraphs can't have their own rankdir, but you can get the effect you want by placing invisible links between the top-level objects, causing them to be laid out top-to-bottom. 来源： https://stackoverflow.com/questions/43353586/cluster-location-in-graphviz-python