set the data from controller into directive - angularjs

Question

I had created the directive file like this:
angular.module('myApp')
.directive('rGraph', function() {
return {
link: function ( scope, element, attrs ) {
var width = Math.max($("#graph-container").innerWidth(), 400);
var height = Math.max(width, 550);
var rgraph = new $jit.RGraph({
injectInto: 'graphcontainer',
width: width,
height: height,
background: {
CanvasStyles: {
strokeStyle: '#555'
}
},
Navigation: {
enable: true,
panning: true,
zooming: 10
},
Node: {
color: '#ddeeff',
overridable: true
},
Edge: {
color: '#C17878',
lineWidth: 1.0
},
onCreateLabel: function(domElement, node){
domElement.innerHTML = node.name;
domElement.onclick = function(){
rgraph.onClick(node.id, {
onComplete: function() {
Log.write("done");
}
});
};
},
onPlaceLabel: function(domElement, node){
style = domElement.style;
style.display = '';
style.cursor = 'pointer';
if (node._depth <= 1) {
style.fontSize = "0.8em";
style.color = "#ccc";
} else if(node._depth == 2){
style.fontSize = "0.7em";
style.color = "#494949";
} else {
style.display = 'none';
}
var left = parseInt(style.left);
var w = domElement.offsetWidth;
style.left = (left - w / 2) + 'px';
},
onBeforePlotNode: function(node){
if (node.data.type == 'group') {
node.setData('type', 'square');
} else if (node.data.type == 'judge') {
node.setData('type', 'star');
node.setData('dim', '8');
}
}
});
//Here I need to set the data
rgraph.loadJSON();
rgraph.refresh();
// Completing animations on every change was too much
// TODO come up with better way to watch for changes
rgraph.graph.eachNode(function(n) {
var pos = n.getPos();
pos.setc(-200, -200);
});
rgraph.compute('end');
rgraph.fx.animate({
modes:['polar'],
duration: 2000
});
}
};
});
And my controller is like this:
angular.module('myApp').controller('AnalysisCtrl', ['$scope', '$http', '$q', 'SearchService', function($scope, $http, $q, SearchService) {
$scope.graph_data = {
'id': 'judge_id',
'name': judge.name,
'type': 'judge',
'children': filters
}
My view is where I ma calling directive is like this:
<div id="graphcontainer" r-graph="graph_data"></div>
Now i need to add the data get from controller i.e data of $scope.graph_data into to the rgraph.loadJSON(); of directives.So how to do that.
Thanks
Sabbu