Gephi forums

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<?xml version='1.0' encoding='UTF-8'?>
<gexf xmlns="http://www.gexf.net/1.2draft" xmlns:viz="http://www.gexf.net/1.2draft/viz" version="1.2">
 <meta lastmodifieddate="2018-03-12">
  <creator>Tester</creator>
  <description>Node size test</description>
 </meta>
 <graph defaultedgetype="undirected" idtype="string" mode="static">
  <nodes count="2">
   <node id="3" label="NodeSize:21.0">
    <viz:color r="255" g="0" b="0"/>
    <viz:size value="21.0"/>
   </node>
   <node id="4" label="NodeSize:20.0">
    <viz:color r="204" g="204" b="255"/>
    <viz:size value="20.0"/>
   </node>
  </nodes>
  <edges count="0">
  </edges>
 </graph>
</gexf>

Code: Select all

package nodesizegephi;

import java.util.ArrayList;
import java.util.List;

public class NodeSizeGephi
{
    private static float sizeMinimum, sizeMaximum;

    private static void setDefaults() {
        sizeMaximum = 100f;
        sizeMinimum = 4f;
    }
    
    public static void main(String[] args)
    {
        setDefaults();
        
        //... Inject my two nodes
        List<Node> nodes = new ArrayList<>();
        nodes.add(new Node(20.0f));
        nodes.add(new Node(21.0f));

        float sizeMin = Float.POSITIVE_INFINITY;
        float sizeMax = Float.NEGATIVE_INFINITY;
        float sizeRatio = 0f;

        //Measure
        for( Node node : nodes )
        {
            sizeMin = Math.min(node.getSize(), sizeMin);
            sizeMax = Math.max(node.getSize(), sizeMax);
        }

        if (sizeMin != 0 && sizeMax != 0)
        {
            if (sizeMin == sizeMax) {
                sizeRatio = sizeMinimum / sizeMin;
            } else {
                sizeRatio = (sizeMaximum - sizeMinimum) / (sizeMax - sizeMin);
            }

            //Scale node size
            for( Node node : nodes )
            {
                float size = (node.getSize() - sizeMin) * sizeRatio + sizeMinimum;
                node.setSize(size);
            }
        }
        
        nodes.forEach((node)->System.out.println("Node size: " +node.getSize()));
    }
}

class Node
{
    private float size;

    public Node(float size)
    {
        this.size = size;
    }

    public float getSize() {
        return size;
    }

    public void setSize(float size) {
        this.size = size;
    }
}