"Display Decision Tree from rapidminer"

rj

    Hi

I have generated xml from java
then i passed xml to process and run the process
after that how can i get the  tree img from rapidminer?

Process process = new Process(readFileAsString(x));
        IOContainer ioResult = process.run();
TreeModelGraphRenderer gr = new TreeModelGraphRenderer();
        Component visualizationComponent = gr.getVisualizationComponent(model, ioResult);
        GraphCreator<String, String> graphCreator = gr.getGraphCreator(model, ioResult);
        edu.uci.ics.jung.graph.Graph createGraph = graphCreator.createGraph();


As per Class TreeModelGraphCreator
Author IngoMierswa 
An adaptor for the graph creator interface. Subclasses might want to override some of the implemented methods and have to define the GraphCreator.createGraph() method.
do we need to override createGraph() method. if so can u give some clue how can i do it to get the graph?

Marco_Boeck

Hi,

you should be able to do this by using this general approach:

RapidMiner.setExecutionMode(ExecutionMode.EMBEDDED_WITHOUT_UI); // or whatever you need
RapidMiner.init();
IOContainer ioResult = process.run();
IOObject result = ioResult.getElementAt(0); // or whatever index you need
String name = RendererService.getName(result.getClass());
List<Renderer> renderers = RendererService.getRenderers(name);
for (Renderer renderer : renderers) { // you don't really need to iterate over this, it's probably only one anyway 
        IOContainer dummy = new IOContainer();
	int imgWidth = 300;
	int imgHeight = 300;
        Reportable reportable = renderer.createReportable(result, dummy, imgWidth, imgHeight);
	if (reportable instanceof Renderable) {
		Renderable renderable = (Renderable) reportable;
		renderable.prepareRendering();
		int preferredWidth = renderable.getRenderWidth(800);
		int preferredHeight = renderable.getRenderHeight(800);
		final BufferedImage img = new BufferedImage(imgWidth, imgHeight, BufferedImage.TYPE_INT_RGB);
		Graphics2D graphics = (Graphics2D) img.getGraphics();
		graphics.setColor(Color.WHITE);
		graphics.fillRect(0, 0, imgWidth, imgHeight);
		double scale = Math.min((double) imgWidth / (double) preferredWidth, (double) imgHeight / (double) preferredHeight);
		graphics.scale(scale, scale);
		renderable.render(graphics, preferredWidth, preferredHeight);
        }
}

Regards,
Marco