我的echarts地图主题不能修改是怎么回事啊?点击下拉框时地图没效果,也不刷新??????

图片说明

 <!DOCTYPE html>
<head>
    <meta charset="utf-8">
    <title>ECharts</title>
    <script>
        var myChart;
        function changeTheme(self){
             //var te = require('echarts/theme/macarons');
             var te = require('echarts/theme/infographic');  //这里改变主题,得看主题模块文件有没有
             myChart.setTheme(te);
        }
    </script>
</head>
<body>
    <!-- 为ECharts准备一个具备大小(宽高)的Dom -->
    <div id="main" style="height:400px"></div>
    <select onchange='changeTheme(this)'>
         <option value='1'>主题1</option>
         <option value='2'>主题2</option>
    </select>
    <!-- ECharts单文件引入 -->
    <script src="http://echarts.baidu.com/build/dist/echarts.js"></script>
    <script type="text/javascript">
        // 路径配置
        require.config({
            paths: {
                echarts: 'http://echarts.baidu.com/build/dist'
            }
        });

        // 使用
        require(
            [
                'echarts',
                'echarts/chart/map',
                'echarts/chart/bar' // 使用柱状图就加载bar模块,按需加载
            ],
            function (ec,te) {
                // 基于准备好的dom,初始化echarts图表
                myChart = ec.init(document.getElementById('main'),te); 

                option = {
    title : {
        text: 'iphone销量',
        subtext: '纯属虚构',
        x:'center'
    },
    tooltip : {
        trigger: 'item'
    },
    legend: {
        orient: 'vertical',
        x:'left',
        data:['iphone3','iphone4','iphone5']
    },
    dataRange: {
        min: 0,
        max: 2500,
        x: 'left',
        y: 'bottom',
        text:['高','低'],           // 文本,默认为数值文本
        calculable : true
    },
    toolbox: {
        show: true,
        orient : 'vertical',
        x: 'right',
        y: 'center',
        feature : {
            mark : {show: true},
            dataView : {show: true, readOnly: false},
            restore : {show: true},
            saveAsImage : {show: true}
        }
    },
    roamController: {
        show: true,
        x: 'right',
        mapTypeControl: {
            'china': true
        }
    },
    series : [
        {
            name: 'iphone3',
            type: 'map',
            mapType: 'china',
            roam: false,
            itemStyle:{
                normal:{label:{show:true}},
                emphasis:{label:{show:true}}
            },
            data:[
                {name: '北京',value: Math.round(Math.random()*1000)},
                {name: '天津',value: Math.round(Math.random()*1000)},
                {name: '上海',value: Math.round(Math.random()*1000)},
                {name: '重庆',value: Math.round(Math.random()*1000)},
                {name: '河北',value: Math.round(Math.random()*1000)},
                {name: '河南',value: Math.round(Math.random()*1000)},
                {name: '云南',value: Math.round(Math.random()*1000)},
                {name: '辽宁',value: Math.round(Math.random()*1000)},
                {name: '黑龙江',value: Math.round(Math.random()*1000)},
                {name: '湖南',value: Math.round(Math.random()*1000)},
                {name: '安徽',value: Math.round(Math.random()*1000)},
                {name: '山东',value: Math.round(Math.random()*1000)},
                {name: '新疆',value: Math.round(Math.random()*1000)},
                {name: '江苏',value: Math.round(Math.random()*1000)},
                {name: '浙江',value: Math.round(Math.random()*1000)},
                {name: '江西',value: Math.round(Math.random()*1000)},
                {name: '湖北',value: Math.round(Math.random()*1000)},
                {name: '广西',value: Math.round(Math.random()*1000)},
                {name: '甘肃',value: Math.round(Math.random()*1000)},
                {name: '山西',value: Math.round(Math.random()*1000)},
                {name: '内蒙古',value: Math.round(Math.random()*1000)},
                {name: '陕西',value: Math.round(Math.random()*1000)},
                {name: '吉林',value: Math.round(Math.random()*1000)},
                {name: '福建',value: Math.round(Math.random()*1000)},
                {name: '贵州',value: Math.round(Math.random()*1000)},
                {name: '广东',value: Math.round(Math.random()*1000)},
                {name: '青海',value: Math.round(Math.random()*1000)},
                {name: '西藏',value: Math.round(Math.random()*1000)},
                {name: '四川',value: Math.round(Math.random()*1000)},
                {name: '宁夏',value: Math.round(Math.random()*1000)},
                {name: '海南',value: Math.round(Math.random()*1000)},
                {name: '台湾',value: Math.round(Math.random()*1000)},
                {name: '香港',value: Math.round(Math.random()*1000)},
                {name: '澳门',value: Math.round(Math.random()*1000)}
            ]
        },
        {
            name: 'iphone4',
            type: 'map',
            mapType: 'china',
            itemStyle:{
                normal:{label:{show:true}},
                emphasis:{label:{show:true}}
            },
            data:[
                {name: '北京',value: Math.round(Math.random()*1000)},
                {name: '天津',value: Math.round(Math.random()*1000)},
                {name: '上海',value: Math.round(Math.random()*1000)},
                {name: '重庆',value: Math.round(Math.random()*1000)},
                {name: '河北',value: Math.round(Math.random()*1000)},
                {name: '安徽',value: Math.round(Math.random()*1000)},
                {name: '新疆',value: Math.round(Math.random()*1000)},
                {name: '浙江',value: Math.round(Math.random()*1000)},
                {name: '江西',value: Math.round(Math.random()*1000)},
                {name: '山西',value: Math.round(Math.random()*1000)},
                {name: '内蒙古',value: Math.round(Math.random()*1000)},
                {name: '吉林',value: Math.round(Math.random()*1000)},
                {name: '福建',value: Math.round(Math.random()*1000)},
                {name: '广东',value: Math.round(Math.random()*1000)},
                {name: '西藏',value: Math.round(Math.random()*1000)},
                {name: '四川',value: Math.round(Math.random()*1000)},
                {name: '宁夏',value: Math.round(Math.random()*1000)},
                {name: '香港',value: Math.round(Math.random()*1000)},
                {name: '澳门',value: Math.round(Math.random()*1000)}
            ]
        },
        {
            name: 'iphone5',
            type: 'map',
            mapType: 'china',
            itemStyle:{
                normal:{label:{show:true}},
                emphasis:{label:{show:true}}
            },
            data:[
                {name: '北京',value: Math.round(Math.random()*1000)},
                {name: '天津',value: Math.round(Math.random()*1000)},
                {name: '上海',value: Math.round(Math.random()*1000)},
                {name: '广东',value: Math.round(Math.random()*1000)},
                {name: '台湾',value: Math.round(Math.random()*1000)},
                {name: '香港',value: Math.round(Math.random()*1000)},
                {name: '澳门',value: Math.round(Math.random()*1000)}
            ]
        }
    ]
};


                // 为echarts对象加载数据 
                myChart.setOption(option); 
            }
        );
    </script>
</body>

http://www.zhihu.com/question/24334831