[visualization-api] a.z is not a function

[Bhavaya Tyagi]

I am trying to use 100% stacked graph in my dashboard it is generating 
following error.

*a.z is not a function:*

*Graph used: Refer Image*
https://developers.google.com/chart/interactive/docs/gallery/barchart

*Code used:*
google.charts.load("current", {packages:["corechart"]});
                     google.charts.setOnLoadCallback(barchart);
                     function barchart() {

                            var barGraph=[];
                           
                             barGraph.push(graph1data);

                          
loadDatagraph($scope.graph1finalArray);
                             function loadDatagraph(result) {
                     $.each(result, function (data, value) {

                   for(var i=0;i< value.length; i++){
                      
                     if(i==0){

                     barGraph.push(value[i].toString());

                     }else{
                      
                       barGraph.push(value[i]);
                     }

                   }

                     })
               }


              alert(barGraph);

                       var view = new
google.visualization.DataView(data888);

                       var options = {
                         width: 600,
                         height: 300,
                         legend: { position: 'top', maxLines: 3 },
                         bar: { groupWidth: '75%' },
                         isStacked: 'percent'
                       };


                       var chart = new
google.visualization.BarChart(document.getElementById("barchart_values"));
                       chart.draw(view, options);
                   }




          });


*Resultant Array:*

var data888 = google.visualization.arrayToDataTable([
                         ['ANo','A1', 'A2', 'A3', 'A4', 'A5',
                          'A6',
'A7','A8', {
role: 'annotation' } ],['Impressions', 135894, 56702, 50002, 50001, 39690, 
48609, 8899,3456,''],['Clicks', 556, 115, 63, 72, 14, 115,98,890, 
''],['CTR', 20000.19999999993,6005.40000000004, 5000.200000000012, 
5000.100000000005, 3968.9999999999777,5000.50000000001,
5002.20000000002,788,'']
                       ]);

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