chartArea の不透明度を設定するにはどうすればよいですか? これが私のコードの一部です...どんなアイデアも役に立ちます。ありがとう!
// Column Chart
function drawVisualization() {
// Create and populate the data table.
var data = google.visualization.arrayToDataTable([
['Year', 'In Millions'],
['2010', 178.7],
['2011', 211.693],
['2012', 199.3]
]);
// Create and draw the visualization.
new google.visualization.ColumnChart(document.getElementById('visualization')).
draw(data,
{title:"",
width:400, height:400,
colors:['#89a7bf', '#b19237', '#698322', '#bf855d', '#196364', '#CCCCCC', '#D64646', '#8E468E'],
legend: {position: 'bottom', width:"250", textStyle: {fontSize: 10}},
hAxis: {title: "Year"}}
);
}
google.setOnLoadCallback(drawVisualization);