主要属性：
//设置柱状图大小
barWidth: 20,
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demo:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>柱状图大小</title>
<!-- 引入 echarts.js -->
<script src="https://cdn.bootcss.com/echarts/4.2.1-rc1/echarts.min.js" type="text/javascript"></script>
<script src="http://code.jquery.com/jquery-1.8.0.min.js"></script>
</head>
<body>
<!-- 为ECharts准备一个具备大小（宽高）的Dom -->
<div id="main" style="width: 600px;height:400px;"></div>
<script type="text/javascript">
// 基于准备好的dom，初始化echarts实例
var myChart = echarts.init(document.getElementById('main'));
// 指定图表的配置项和数据
myChart.setOption({
title: {
text: '柱状图'
},
tooltip: {},
legend: {
data: ['销量']
},
xAxis: {
data: ["1", "2", "3", "4", "5", "6", "7", "8", "9"]
},
yAxis: {},
series: [{
name: '销量',
type: 'bar',
//设置柱状图大小
barWidth: 20,
//设置柱状图渐变颜色
itemStyle: {
normal: {
color: new echarts.graphic.LinearGradient(0, 1, 0, 0, [{
offset: 0,
color: "#1268f3" // 0% 处的颜色
}, {
offset: 0.6,
color: "#08a4fa" // 60% 处的颜色
}, {
offset: 1,
color: "#01ccfe" // 100% 处的颜色
}], false)
}
},
data: ["1", "2", "3", "4", "5", "2", "3", "4", "3"]
}]
});
</script>
</body>
</html>
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