animationDurationUpdate: 2000, // for update animation, like legend selected.
option = {
backgroundColor: '#1b1b1b',
color: ['gold','aqua','lime'],
title : {
text: '模拟迁徙',
subtext:'数据纯属虚构',
x:'center',
textStyle : {
color: '#fff'
}
},
tooltip : {
trigger: 'item',
formatter: '{b}'
legend: {
orient: 'vertical',
x:'left',
data:['北京', '上海', '广州'],
selectedMode: 'single',
selected:{