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POcreate force directed layout gexf file with node position generation
 

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  1. POcreate force directed layout gexf file with node position generation
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    <p>In my Database i've got nodes and edges.</p> <p>Position must have generated at gexf generation, the node must not overlap and</p> <p>generate this kind of Graph: <a href="http://www.nwoods.com/components/images/force-directed-layout.png" rel="nofollow">http://www.nwoods.com/components/images/force-directed-layout.png</a></p> <p>I use Sigma.js for presentating the graph.</p> <p><em>How can i calculate the node postition with an force directed alogrithm, with a root item?</em></p> <p>Or there a layout that can generate from node and edges a layout that not overlap and output like this png above?</p> <p>EDIT:</p> <p>PHP code for generating node position:</p> <pre><code> function _generate_gexf_node($test=false){ $count = 0; foreach ($node_array as $node) { $node_size = '22.714287'; $node_poz = ' x="'.rand(10, 300).'" y="'.rand(10, 300).'" z="'.rand(10, 300).'" '; $node_color = ' b="45" g="72" r="216" '; $data['node'][] = '&lt;node id="'.$node['node_id'].'" label="'.$node['label'].'"&gt; &lt;attvalues&gt; &lt;attvalue for="authority" value="0.01880342"/&gt; &lt;attvalue for="hub" value="0.01880342"/&gt; &lt;/attvalues&gt; &lt;viz:size value="'.$node_size.'"/&gt; &lt;viz:color '.$node_color.'/&gt; &lt;viz:position '.$node_poz.'/&gt; &lt;/node&gt; '; $count++; } return $data; } </code></pre> <p>How can i gnerete the position in "runtime", to like this <a href="http://www.nwoods.com/components/images/force-directed-layout.png" rel="nofollow">http://www.nwoods.com/components/images/force-directed-layout.png</a>?</p> <p>Where can i find implementation of YiFan Hu Force directed algorithm?</p> <p>Or a special Bubble layout implementation?</p>
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    1. COWell you should actually at least show the php code and the according data (files?) you have so far for gexf file generation as there is no standard graph library with PHP out-of-the-box.
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    3. COGephi use YiFanHU multilevel algorithym. I test is and it make the random layout very good. http://wiki.gephi.org/index.php/YifanHu_Multilevel How can i use this with php? Or there are implementation?
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