radio buttons in angular

http://angularjs.org/

HTML

<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
 <div data-toggle="buttons">
                   <label class="btn active">
                   <input type="radio" ng-model="value" value="ongoing" ng-change="update(value)">Ongoing
                   </label>                               
                   <label class="btn">
                   <input type="radio" ng-model="value" value="completed" ng-change="update(value)">Past 
                   </label>
             </div>
</div>

JavaScript

var myApp = angular.module('myApp',[]);

//myApp.directive('myDirective', function() {});
//myApp.factory('myService', function() {});

function MyCtrl($scope) {
    $scope.update = function(value){
console.log("the click value is"+value)     
}
}