dataset数据集配置数据

dataset数据集，也可以完成数据的映射，一般用于一段数据画多个图表

例子：

options = {tooltip: {},dataset: {source: [["product", "2015", "2016", "2017"],["test", 10, 20, 30],["aaaa", 5, 15, 25],["bbbb", 12, 22, 32],],},xAxis: {type: "category",},yAxis: {},series: [{type: "line",},{type: "line",},{type: "line",},],};

dataset配合encode使用

如果data为对象的形式，可以使用encode

const data = [{time: "2024-01-01",value: 111,},{time: "2024-02-02",value: 222,},{time: "2024-03-03",value: 333,},{time: "2024-04-04",value: 444,},
];options = {tooltip: {},dataset: {source: data,},xAxis: {type: "category",},yAxis: {},series: [{type: "line",encode: {x: "time",y: "value",},},],};

还可以使用 dimension

const data = [{time: "2024-01-01",value: 111,},{time: "2024-02-02",value: 222,},{time: "2024-03-03",value: 333,},{time: "2024-04-04",value: 444,},
];options = {tooltip: {},dataset: {source: data,dimension: ["time", "value"],},xAxis: {type: "category",},yAxis: {},series: [{type: "line",},],};

dimension 还可以定义多个图表

const data = [{time: "2024-01-01",value: 111,newValue: 222,},{time: "2024-02-02",value: 222,newValue: 333,},{time: "2024-03-03",value: 333,newValue: 444,},{time: "2024-04-04",value: 444,newValue: 555,},
];
options = {tooltip: {},dataset: {source: data,dimension: ["time", "value", "newValue"],},xAxis: {type: "category",},yAxis: {},series: [{type: "line",},{type: "line",},],};

graphic 在图表上加一些自定义图形

 options = {tooltip: {},dataset: {source: data,dimension: ["time", "value", "newValue"],},xAxis: {type: "category",},yAxis: {},graphic: [{type: "rect",left: 10,top: 10,shape: {width: 30,height: 30,},style: {fill: "rgba(0,0,0,0.4)",strokeWidth: 1,stroke: "black",},},{type: "text",left: 20,top: 20,style: {text: "test",fill: "red",fontSize: "12px",},},],series: [{type: "line",},{type: "line",},],};

dataZoom 用于筛选某个范围内的数据

 options = {tooltip: {},dataset: {source: data,dimension: ["time", "value", "newValue"],},xAxis: {type: "category",},yAxis: {},dataZoom: [{type: "slider",show: true,yAxisIndex: [0], //对第一个y轴生效,可以指定多个坐标轴start: 0,end: 100,},],series: [{type: "line",},{type: "line",},],};

可以给x,y轴都指定

options = {tooltip: {},dataset: {source: data,dimension: ["time", "value", "newValue"],},xAxis: {type: "category",},yAxis: {},dataZoom: [{type: "slider",show: true,yAxisIndex: [0], //对第一个y轴生效start: 0,end: 100,left: "50%",},{type: "slider",show: true,xAxisIndex: [0],start: 0,end: 100,},],series: [{type: "line",},{type: "line",},],};

toolbox 工具栏

内置有导出图片，数据视图，动态类型切换，数据区域缩放，重置五个工具。

options = {toolbox: {show: true,feature: {saveAsImage: {type: "png",title: "保存图片",},},},dataset: {source: data,dimension: ["time", "value", "newValue"],},xAxis: {type: "category",},yAxis: {},series: [{type: "line",},{type: "line",},],};