angular nvd3

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/angular.js/1.1.5/angular.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.3.9/d3.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/nvd3/1.1.13-beta/nv.d3.min.js"></script>
<script src="http://cmaurer.github.io/angularjs-nvd3-directives/lib/angularjs-nvd3-directives/dist/angularjs-nvd3-directives.js"></script>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/nvd3/1.1.13-beta/nv.d3.css">
<div ng-app='nvd3TestApp'>
<div  ng-controller="ExampleCtrl">
    <nvd3-discrete-bar-chart
            data="exampleData"
            id="exampleId"
            height="400"
            tooltips="true"
            showXAxis="true"
            showYAxis="true">
        <svg></svg>
    </nvd3-discrete-bar-chart>
    
    <nvd3-discrete-bar-chart
            data="exampleData2"
            id="exampleId2"
            width="800"
            height="400"
            tooltips="true"
            showXAxis="true"
            showYAxis="true">
        <svg></svg>
    </nvd3-discrete-bar-chart>    
</div>

</div>

JavaScript

angular.module("nvd3TestApp", ['nvd3ChartDirectives']);

        function ExampleCtrl($scope){
            $scope.exampleData = [
                {
                    key: "Cumulative Return",
                    values: [
                        ["A", -29.765957771107 ],
                        ["B" , 0 ],
                        ["C" , 32.807804682612 ],
                        ["D" , 196.45946739256 ],
                        ["E" , 0.19434030906893 ],
                        ["F" , -98.079782601442 ],
                        ["G" , -13.925743130903 ],
                        ["H" , -5.1387322875705 ]
                    ]
                }
            ];
            
          $scope.exampleData2 = [
                {
                    key: "Cumulative Return",
                    values: [
                        ["A", -29.765957771107 ],
                        ["B" , 0 ],
                        ["C" , 32.807804682612 ],
                        ["D" , 196.45946739256 ],
                        ["E" , 0.19434030906893 ],
                        ["F" , -98.079782601442 ],
                        ["G" , -13.925743130903 ],
                        ["H" , -5.1387322875705 ]
                    ]
                },
                {
                    key: "Cumulative Return2",
                    values: [
                        ["A", 10.765957771107 ],
                        ["B" , 0 ],
                        ["C" , -32.807804682612 ],
                        ["D" , 96.45946739256 ],
                        ["E" , 0.19434030906893 ],
                        ["F" , -38.079782601442 ],
                        ["G" , -43.925743130903 ],
                        ["H" , -3.1387322875705 ]
                    ]
                }              
            ];

            
            $scope.$on('tooltipShow.directive', function(event){
                console.log('scope.tooltipShow', event);
            });

            $scope.$on('tooltipHide.directive',...