pygraphviz

问题 I am trying to draw a 100 node multi-graph G in graphviz layout in python's networkx so I made two trials so far: Trial 1 nx.draw_graphviz function as follows nx.draw_graphviz(G) but I get the following error repeated for all nodes in the graph: Error: node 1, position [0.127506302389087, 0.3262608552621944], expected two doubles Then trying to figure a solution I used trial 2 A=nx.to_agraph(G) to get a pygraphviz graph but when I try to draw with nx.draw_graphviz(A) I get the following Error

问题 I believe I have installed pygraphviz on my Debian build. I can import it if I run Python from the command line: jon@debian:~/anaconda3/bin$ ipython Python 3.5.1 |Continuum Analytics, Inc.| (default, Dec 7 2015, 11:17:45) Type "copyright", "credits" or "license" for more information. IPython 4.1.2 -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object', use

问题 I am trying to use pygraphviz and networkx in python (v 2.7) to create a network map. I found a script that looks very useful on stackoverflow: import networkx as nx import numpy as np import string import pygraphviz dt = [('len', float)] A = np.array([(0, 0.3, 0.4, 0.7), (0.3, 0, 0.9, 0.2), (0.4, 0.9, 0, 0.1), (0.7, 0.2, 0.1, 0) ])*10 A = A.view(dt) G = nx.from_numpy_matrix(A) G = nx.relabel_nodes(G, dict(zip(range(len(G.nodes())),string.ascii_uppercase))) G = nx.to_agraph(G) G.node_attr

问题 I have updated to pygraphviz 1.5 using this wheel here Installing pygraphviz on Windows 10 64-bit, Python 3.6. I'm having problems with it. import pygraphviz as pgv G = pgv.AGraph() G.add_node('a') G.add_node('b') G.add_edge('a', 'b') g_string = G.string() print(g_string) gives me strict digraph { a -- b; } while the same code ran on previous version 1.3 gives me strict digraph { a -> b; } I have even tried G.add_edge('a', 'b', arrowhead="normal") which gives a -- b [arrowhead=normal]; but

问题 I need to create a graph from a set of data. I have sifted through countless SO questions but not been able to find a solution that fits all the must-have requirements. What's needed: http://i.imgur.com/hzQHD07.png Must-have requirements: Hierarchical placement of nodes Ordered placement of nodes, i.e. 'A' should be to the left of 'B' Parallel edges between nodes Minimum length of edge (to avoid label encroaching upon node, as in D--E) Programmatic solution, requires little to no editing of

问题 import pygraphviz as pgv A = pgv.AGraph() A.add_node('Alice') A.add_node('Emma') A.add_node('John') A.add_edge('Alice', 'Emma') A.add_edge('Alice', 'John') A.add_edge('Emma', 'John') print A.string() print "Wrote simple.dot" A.write('simple.dot') # write to simple.dot B = pgv.AGraph('simple.dot') # create a new graph from file B.layout() # layout with default (neato) B.draw('simple.png') # draw png print 'Wrote simple.png' I want to add weights to the edges which should also show up on the

问题 After running the following Python code: import pygraphviz as pgv G=pgv.AGraph() G.add_edge(1,2) G.add_edge(2,3) G.add_edge(3,4) G.layout(prog='dot') G.draw('1.png') I got this trace in IDLE: File "<pyshell#7>", line 1, in <module> G.layout(prog='dot') File "C:\Python27\lib\site-packages\pygraphviz\agraph.py", line 1302, in layout data=self._run_prog(prog,' '.join([args,"-T",fmt])) File "C:\Python27\lib\site-packages\pygraphviz\agraph.py", line 1275, in _run_prog raise IOError("".join(errors)

问题 I see many questions on the difficulties of properly installing pygraphviz and graphviz on Windows for Python 2.7. But no answers that I have found is solving my problem. Here's what I did: I first installed pygraphviz using unofficial windows binaries with this link in my anaconda (python) folder ( C:\Users\chamar\AppData\Local\Continuum\Anaconda ) Downloaded graphviz-2.36.msi and installed it under the default path C:\Program Files (x86)\Graphviz2.36 The command import pygraphviz in Python

问题 I have a dataset that represents a kind of genealogy tree. Each node has 2 parents (except first generation, they have no parents). For a given node, its parents can be from any previous generation. For example a node in generation n, can have a parent in n-1, and another parent in n-5. A node can be parent of several other nodes. So basically, for every node I know its generation and its parents. I am trying to represent this graph keeping the nodes from the same generation in the same line.

问题 After installing the latest graphviz (2.26.3) on my Windows 7 Ultimate 64bit, I receive the following error: C:>easy_install pygraphviz Searching for pygraphviz Reading http://pypi.python.org/simple/pygraphviz/ Reading http://networkx.lanl.gov/pygraphviz Reading http://networkx.lanl.gov/wiki/download Reading http://networkx.lanl.gov/download/pygraphviz Reading http://sourceforge.net/project/showfiles.php?group_id=122233&package_id=161979 Reading http://networkx.lanl.gov/download Best match: