echarts设置饼状图的大小以及图形位置

var ccbpie = {}; 

ccbpie.pie = function(text,divId,data){
    require.config({
		paths : {
			echarts : getBaseURL() + '/js/echarts_news/dest'
		}
	});
	require([ 'echarts' ,'echarts/chart/pie','echarts/chart/funnel'
	], function(ec) {
		var myChart = ec.init(document.getElementById(divId));
		option = {
			   /* tooltip : {
			        trigger: 'item', 
			        formatter: "{a} 
{b} : {c} ({d}%)"
			    },*/
			    legend: {
			    	orient : 'vertical',
			    	x : 10,
			    	y : 100,
			        data:['新闻','微信','微博']
			    },
			    color:['#B0DC00','#8352BE','#F09252'],
			    toolbox: {
			        show : true,
			        feature : {
			            saveAsImage : {show: true}
			        }
			    },
			    calculable : false,
			    series : [
			        {
			            type:'pie',
			            radius : '70%',
			            center: ['55%','55%'],
			            /*selectedMode: 'single',*/
			            itemStyle:{ 
			                normal:{ 
			                      label:{ 
			                        show: true, 
			                        formatter: '{b} : {c} ({d}%)' ,
			                        length:5
			                      }, 
			                      labelLine :{show:true} 
			                    } 
			                },
			            data:[
							{value:eval('(' + data + ')')[0], name:'新闻',
								itemStyle: {
				                    normal: {
				                    	   label: { show: function () {
				                               if (eval('(' + data + ')')[0] == 0)
				                               { return false; }
				                           } ()
				                           },
				                           labelLine: { show: function () {
				                               if (eval('(' + data + ')')[0] == 0)
				                               { return false; }
				                           } ()
				                           }
				                    }
				                }
							},
							{value:eval('(' + data + ')')[1], name:'微信',
								itemStyle: {
				                    normal: {
				                    	   label: { show: function () {
				                               if (eval('(' + data + ')')[1] == 0)
				                               { return false; }
				                           } ()
				                           },
				                           labelLine: { show: function () {
				                               if (eval('(' + data + ')')[1] == 0)
				                               { return false; }
				                           } ()
				                           }
				                    }
				                }	
							},
							{value:eval('(' + data + ')')[2], name:'微博',
								itemStyle: {
				                    normal: {
				                    	   label: { show: function () {
				                               if (eval('(' + data + ')')[2] == 0)
				                               { return false; }
				                           } ()
				                           },
				                           labelLine: { show: function () {
				                               if (eval('(' + data + ')')[2] == 0)
				                               { return false; }
				                           } ()
				                           }
				                    }
				                }	
							},
			            ]
			        }
			    ]
			};
			myChart.setOption(option);	
		});
}