ECharts图表实战经验1：如何设置图表同序列不同数据点的独立颜色值

在option中增加属性color，并指定几种颜色，此颜色将根据饼图的区域个数循环，代码段如下：

option = {  
    title : {  
        text: '全局指标状态分布图',  
        x:'left',  
        y:'top'  
    },  
    tooltip : {  
        show: true,  
        formatter: "{a} <br/>{b} : {c} ({d}%)"  
    },  
    color:['red', 'green','yellow','blueviolet']  
} 

http://echarts.baidu.com/echarts2/doc/example/bar14.html

itemStyle: {
    normal: {
        color: function(params) {
            // build a color map as your need.
            var colorList = [
            '#C1232B','#B5C334','#FCCE10','#E87C25','#27727B',
            '#FE8463','#9BCA63','#FAD860','#F3A43B','#60C0DD',
            '#D7504B','#C6E579','#F4E001','#F0805A','#26C0C0'
            ];
            return colorList[params.dataIndex]
           },
        label: {
            show: true,
            position: 'top',
            formatter: '{b}\n{c}'
        }
    }
}

http://echarts.baidu.com/echarts2/doc/example/bar15.html

var colorList = [
'#ff7f50','#87cefa','#da70d6','#32cd32','#6495ed',
'#ff69b4','#ba55d3','#cd5c5c','#ffa500','#40e0d0'
];
var itemStyle = {
    normal: {
        color: function(params) {
            if (params.dataIndex < 0) {
                // for legend
                return zrColor.lift(
                    colorList[colorList.length - 1], params.seriesIndex * 0.1
                    );
            }
            else {
                // for bar
                return zrColor.lift(
                    colorList[params.dataIndex], params.seriesIndex * 0.1
                    );
                }
            }
    }
};