sigma.js - How to programmatically adjust the size of the nodes based on the number of outbound edges

outDegreeToSize.js

/*
Add the function to the public prototype :
*/
sigma.publicPrototype.outDegreeToSize = function() {
  this.iterNodes(function(node){
    node.size = node.outDegree;
  }).draw();
};

/*
Of course, it works as well with node.degree and node.inDegree.

How to test it:
1. Open any sigma example - http://sigmajs.org/examples.html
2. Open a console         - http://bit.ly/GVshi6
3. Enter the previous code
4. Try it on the first sigma.js instance on the page:
     sigma.instances[1].outDegreeToSize();

Also, if you want to choose the minimum/maximum node sizes:
     sigma.instances[1].graphProperties({
       minNodeSize: 1,
       maxNodeSize: 3
     });
*/

Also I found a very small mistake in the sigma.parseGexf.js library to parse the gexf file:
at line 138 you have: var al = attvalueNode.getAttribute('value'); and then the next line is edge.attributes.push({attr:attr, val:val});
But variable val doesn't exist as the defined variable name is al by mistake.

Valerio

First, about the edges and the GEXF schema, I get your point, but sigma.js is initially only a graph drawing engine - which is why even the ForceAtlas2 is implemented as a plugin. So, I prefer the type of an edge to be describing its appearance, then it is easier to customize how to draw them (like arrow, curve2, dotted, etc...).

About the mistake in the GEXF parser, thanks a lot, I am fixing it, it will be updated in the repository soon :)

I see and understand your point.
Anyway the library is working perfectly now about inDegree and outDegree attributes, thanks a lot for all the time you spent dealing with me!

Valerio

Hi,

can we get pagerank, Closeness Centrality, Eigenvector Centrality of nodes ?

Thanks

I'd also be interested in hgillh request

Hi,
sigma.publicPrototype.outDegreeToSize = function() {
this.iterNodes(function(node){
node.size = node.outDegree;
}).draw();
};

/*
Of course, it works as well with node.degree and node.inDegree.

How to test it:

1. Open any sigma example - http://sigmajs.org/examples.html
2. Open a console - http://bit.ly/GVshi6
3. Enter the previous code
4. Try it on the first sigma.js instance on the page:
   sigma.instances[1].outDegreeToSize();

Also, if you want to choose the minimum/maximum node sizes:
sigma.instances[1].graphProperties({
minNodeSize: 1,
maxNodeSize: 3
});

I need working example for ""outDegreeToSize"" plz help me every thing else is working fine with Sigma.js plz give me the even the shortest example but give me the one which is working i will modify it accordingly... waiting for reply..

By example i mean like other example on sigma.js they are so helpfull put this code in one of this example and post it here .. thats all i want... Thanx in advance...

Did this change with v1.0.0? I am opening examples/basic.html but I am getting one error. I will post what I do.

First, I am trying sigma.instances(), but this method is not working without id:

TypeError: Object #<Object> has no method 'extends'

This is throwing an error:"sigma.publicPrototype is undefined".What to do?