如何为柱形图中的条添加不同的颜色。在选项中添加颜色字段不起作用。请帮忙。
下面是代码片段:
tdata.addRow([col1, arr[0].Manual])
tdata.addRow([col2, arr[0].Auto]);
tdata.addRow([col3, arr[0].Amount]);
options = {
fontSize: 12,
height: 430,
width: 380,
chartArea: { left: "25%", top: "20%", right: "5%", bottom: "10%" },
backgroundColor: '#f5f5f5',
title: 'Project',
pieSliceText: 'value',
colors: ['red', 'green', 'blue'],
'is3D': true
};
var chart = new google.visualization.ColumnChart(document.getElementById('drilldown_div'));
chart.draw(tdata, options);
return false;