Filter for radial layouts of graphs

twopi behavior under Linux and Mac OS


just curious about why twopi behaves so differently for the same graph under Linux as opposed to my local environment in Mac? Though the layout is not deterministic, In the latter environment I always get some version of what I've included below: nice radial layout. Under linux, however, the output seems indistinguishable from neato.





GNU/Linux 2.6.18

twopi - graphviz version 2.26.3 (20100126.1600)

Under Linux I get this:

C and Graphviz

I'm working on a fuzzy pattern recognition system where, fuzzy relations, are represented by matrices.

We can look at such fuzzy matrices as adjacency matrices for directed graphs.

What I need to do is to draw the digraph related to a particular fuzzy matrix.

Is is possible to do this directly from my C code ?

Thank you in advance.

graphViz in php

I have a huge database to display in graph representation. I need to draw graphs dynamically in php. I have been googling for possible ready solutions for graph layout  creating. Found that graphviz would be nice to use.
But I cannot find anywhere some tutorial for beginners how to start using it in php.
I have installed GraphViz, but nothing works. I dont want to use commandline for programming. I cannot implement it in php files.
No step-by-step userguid in the internet.
Someone help me please!!

distance function used by twopi

According to the twopi documentation, a node N at distance K of the root will be in the Kth circle. However, it seems that this distance is computed by ignoring the direction of the arrows. For instance, in
digraph g {
 s0 -> s1;
 s0 -> s2;
 s1 -> s3;
 s2 -> s4;
 s4 -> s0;
s4 is in the 1st circle instead of being in the 2nd since dist(s0,s4) = 2 (s0 -> s2 -> s4).

Graphing social connections

Hello everyone, I've been using graphviz for a little while now and I've always been really amazed by the quality of the outputs. I've always succeed in tweaking a bit my graphs so that the final output was the one I wanted, until now. I'd like to build a tool to graph my connections to my groups of friends. Basically, I have a few groups of friends (<10) that I want to represent as node around a root node (that would be me) Some of my friends can be part of 1, 2 or maybe 3 different groups max. I'm not considering subgroups yet.

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