If I draw line chart there is no problem but I want to this on histogram
graph..
For LineChart;
var chart = new
google.visualization.LineChart(document.querySelector('#chart_div'));
For Histogram;
var chart = new
google.visualization.Histogram(document.querySelector('#chart_div'));
Other Codes;
function drawChart () {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Name');
data.addColumn({type: 'string', role: 'annotation'});
data.addColumn('number', 'Value');
data.addRows([
['Foo', null, 4],
['Bar', null, 3],
['Baz', null, 7],
['Bat', null, 9],
['Cad', 'Vertical line here', 9],
['Qud', null, 2],
['Piz', null, 6]
]);
var chart = new
google.visualization.Histogram(document.querySelector('#chart_div'));
chart.draw(data, {
height: 300,
width: 400,
annotation: {
// index here is the index of the DataTable column providing the
annotation
1: {
style: 'line'
}
}
});}
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