The following NumberRangeFilter works great:
https://code.google.com/apis/ajax/playground/?type=visualization#numberrangefilter_control
However, I am trying to filter on more then one column. Basically I wish
the filter to apply to both 2010 and 2011 year data.
This is what I am trying to do, but it does not work:
var data = new google.visualization.DataTable();
data.addColumn('string', 'Organisation');
data.addColumn('number', '2010');
data.addColumn('number', '2011');
data.addRows([
['France',10,15],
['Germany',20,30],
['Spain',30,5],
['Italy',20,10],
]);
var slider = new google.visualization.ControlWrapper({
'controlType': 'NumberRangeFilter',
'containerId': 'control1',
'options': {
'filterColumnLabel': '2010','2011',
'minValue': 0,
'maxValue': 60
}
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