Toolkit - Import Dynamic Network from multiple static files

From Gephi:Wiki

Jump to: navigation, search

This Toolkit Example is part of the toolkit-demos project, that can be download from the website.

Demo DynamicProcessor

This demo shows how to create a dynamic network from a set of 'static' files using the DynamicProcessor (Time Frame Import). It also shows how to read and filter dynamic attributes. See Attributes API types documentation to learn more about dynamic types.

It uses a simple dataset of three GEXF files. The graph has a 'price' attribute, which will therefore be set a DYNAMIC_INTEGER type automatically.

It does the following steps:

  • Create a project and a workspace, it is mandatory.
  • Import timeframe1.gexf into an import container.
  • Create an configure the DynamicProcessor.
  • Append the container for the time '2007'.
  • Import timeframe2.gexf and append it for '2008'.
  • Import timeframe3.gexf and append it for '2009'.
  • Read the 'price' value for each node, one can see the value for each interval.
  • Use AVERAGE and MAX evaluators to see how to get a Integer result from a DynamicInteger for any time interval.
  • Create a dynamic range and attribute range filter queries. The aim is to keep the graph [2007-2008] with average price superior or equal to seven.
  • Add the filter query to the filter model and execute it. Get a GraphView as a result.
  • Verify the node '4' doesn't belong to the result, as it's average price is lower than seven.

The DynamicProcessor is able to import DOUBLE or DATE values. Default is DOUBLE.

When filtering the graph using a DynamicRangeFilter, parent filter queries (e.g executed after) are using the visible interval to get a simple result from a dynamic value. In this example that means the AttributeRangeFilter is getting the 'price' from the [2007, 2008] interval only. The filter uses the default Estimator set in the DynamicModel. One can set these default estimators from the DynamicController. 

public void script() {
	//Init a project - and therefore a workspace
    ProjectController pc = Lookup.getDefault().lookup(ProjectController.class);
    pc.newProject();
    Workspace workspace = pc.getCurrentWorkspace();
 
    //Import first file
    ImportController importController = Lookup.getDefault().lookup(ImportController.class);
    Container container;
    try {
        File file = new File(getClass().getResource("/org/gephi/toolkit/demos/resources/timeframe1.gexf").toURI());
        container = importController.importFile(file);
    } catch (Exception ex) {
        ex.printStackTrace();
        return;
    }
 
    //Initialize the DynamicProcessor - which will append the container to the workspace
    DynamicProcessor dynamicProcessor = new DynamicProcessor();
    dynamicProcessor.setDateMode(false);    //Set 'true' if you set real dates (ex: yyyy-mm-dd), it's double otherwise
    dynamicProcessor.setLabelmatching(true);   //Set 'true' if node matching is done on labels instead of ids
 
    //Set date for this file
    dynamicProcessor.setDate("2007");
 
    //Process the container using the DynamicProcessor
    importController.process(container, dynamicProcessor, workspace);
 
    //Import second file
    try {
        File file = new File(getClass().getResource("/org/gephi/toolkit/demos/resources/timeframe2.gexf").toURI());
        container = importController.importFile(file);
    } catch (Exception ex) {
        ex.printStackTrace();
        return;
    }
 
    //Set date for this file
    dynamicProcessor.setDate("2008");
 
    //Process the second container
    importController.process(container, dynamicProcessor, workspace);
 
    //Import third file
    try {
        File file = new File(getClass().getResource("/org/gephi/toolkit/demos/resources/timeframe3.gexf").toURI());
        container = importController.importFile(file);
    } catch (Exception ex) {
        ex.printStackTrace();
        return;
    }
 
    //Set date for this file
    dynamicProcessor.setDate("2009");
 
    //Process the third container
    importController.process(container, dynamicProcessor, workspace);
 
    //Get the price attribute
    GraphModel graphModel = Lookup.getDefault().lookup(GraphController.class).getModel();
    Graph graph = graphModel.getGraph();
    for (Node n : graph.getNodes()) {
        DynamicInteger value = (DynamicInteger) n.getNodeData().getAttributes().getValue("price");
        System.out.println("'" + n.getNodeData().getLabel() + "': " + value.toString());
    }
 
    //Get the price attribute in average - learn more about ESTIMATOR
    for (Node n : graph.getNodes()) {
        DynamicInteger value = (DynamicInteger) n.getNodeData().getAttributes().getValue("price");
 
        Integer priceFrom2007to2009Avg = value.getValue(new Interval(2007, 2009), Estimator.AVERAGE);
        System.out.println("With AVERAGE estimator: '" + n.getNodeData().getLabel() + "': " + priceFrom2007to2009Avg);
 
        Integer priceFrom2007to2009Max = value.getValue(new Interval(2007, 2009), Estimator.MAX);
        System.out.println("With MAX estimator: '" + n.getNodeData().getLabel() + "': " + priceFrom2007to2009Max);
    }
 
    //Create a dynamic range filter query
    FilterController filterController = Lookup.getDefault().lookup(FilterController.class);
    FilterBuilder[] builders = Lookup.getDefault().lookup(DynamicRangeBuilder.class).getBuilders();
    DynamicRangeFilter dynamicRangeFilter = (DynamicRangeFilter) builders[0].getFilter();     //There is only one TIME_INTERVAL column, so it's always the [0] builder
    Query dynamicQuery = filterController.createQuery(dynamicRangeFilter);
 
    //Create a attribute range filter query - on the price column
    AttributeModel attributeModel = Lookup.getDefault().lookup(AttributeController.class).getModel();
    AttributeColumn priceCol = attributeModel.getNodeTable().getColumn("price");
    AttributeRangeBuilder.AttributeRangeFilter attributeRangeFilter = new AttributeRangeBuilder.AttributeRangeFilter(priceCol);
    Query priceQuery = filterController.createQuery(attributeRangeFilter);
 
    //Set dynamic query as child of price query
    filterController.add(priceQuery);
    filterController.add(dynamicQuery);
    filterController.setSubQuery(priceQuery, dynamicQuery);
 
    //Set the filters parameters - Keep nodes between 2007-2008 which have average price >= 7
    dynamicRangeFilter.setRange(new Range(2007.0, 2008.0));
    attributeRangeFilter.setRange(new Range(7, Integer.MAX_VALUE));
 
    //Execute the filter query
    GraphView view = filterController.filter(priceQuery);
    Graph filteredGraph = graphModel.getGraph(view);
 
    //Node 3 shoudln't be in this graph
    System.out.println("Node 3 in the filtered graph: " + filteredGraph.contains(graph.getNode("3")));

Retrieved from "http://wiki.gephi.org/index.php/Toolkit_-_Import_Dynamic_Network_from_multiple_static_files"
Personal tools