If your chart data arrays are wrapped in an array:
$scope.exampleDataPieChart = [
$scope.exampleDataPieChart0,
$scope.exampleDataPieChart1
];
then, you can use $index
to select one of them:
<div ng-repeat="item in [0, 1]">
<nvd3-pie-chart
data="exampleDataPieChart[$index]"
...
</nvd3-pie-chart>
</div>
Or, simply:
<div ng-repeat="chart in exampleDataPieChart">
<nvd3-pie-chart
data="chart"
...
</nvd3-pie-chart>
</div>