Dynamic Columns and Points?

I have a problem with C3 chart library when I use joint with AngularJS. I have a bar and pie chart, and I need that the columns and points would be dynamics. But when I use dynamic columns, the chart becomes unformatted.
Chart code:

```

```

Controller Code:

```
function TiposProtocolosPeriodoCtrl($scope) {

$scope.datapoints = [];
$scope.datacolumns = [];
$scope.datax = {
'id': 'categoria'
};

$scope.formatPie = function(value) {
return value;
};

$scope.$on('atualizarGraficoTiposProtocolosPeriodo', function(event, data) {
$scope.datapoints = data.datapoints;
$scope.datacolumns = data.datacolumns;...});
```

At times, I need two columns, other 4 columns.
In fact, it comes from the database.

Is there any way that leaves the formatted chart?

Thanks!