美国储蓄率、资本形成率和净出口ECharts Gallery

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代码
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option = {
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        feature: {
            saveAsImage: {
                pixelRatio: 5
            }
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    },
    title: [
        {
            text: '美国储蓄率、资本形成率和净出口',
            left: 'center'
        },
        {
            subtext: '这个图反映的是储蓄缺口（两根折线\n之间的阴影部分）和净出口的关系\n注：此图的原作者为中国人民大学\n经济学院于春海教授，原图出处为\n《失衡、危机与再平衡：对美国贸易赤字的再思考》',
            subtextStyle:{
                fontStyle:'bold'
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            left: 80,
            top:300
        },
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    tooltip: {
        trigger: 'axis',
        formatter: '{b}<br/>{a0}: {c0}%<br/>{a2}:  {c2}%<br/>{a3}:  {c3} 千亿美元'
    },
    legend: {
        orient: 'vertical',
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        data: ['资本形成率(左轴)', '储蓄率（左轴）', '净出口（右轴）']
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        // name: 'Year',
        // axisTick: {
        //     alignWithLabel: true,
        //     interval: 0
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        splitLine: {
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        },
        data: [1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016],
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            //     }, {
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