echart 能量图

ECharts（百度开源的一个数据可视化库）中的能量图（Sankey Diagram）可以用于展示能量、物质、信息等在不同阶段之间的流动情况。以下是一个简单的能量图示例：

option = {
    title: {
        text: '能量图示例'
    },
    tooltip: {
        trigger: 'item',
        formatter: "{a} <br/>{b} : {c}"
    },
    series: [
        {
            type: 'sankey',
            layout: 'none',
            data: [
                {name: '能量1'},
                {name: '能量2'},
                {name: '能量3'},
                {name: '能量4'},
                {name: '能量5'},
                {name: '能量6'}
            ],
            links: [
                {source: '能量1', target: '能量2', value: 10},
                {source: '能量1', target: '能量3', value: 8},
                {source: '能量2', target: '能量4', value: 6},
                {source: '能量2', target: '能量5', value: 4},
                {source: '能量3', target: '能量4', value: 3},
                {source: '能量3', target: '能量5', value: 5},
                {source: '能量4', target: '能量6', value: 9},
                {source: '能量5', target: '能量6', value: 7}
            ],
            lineStyle: {
                opacity: 0.5,
                curveness: 0.5
            }
        }
    ]
};

可以通过 ECharts 官网提供的在线编辑器进行实时预览和调试。