Large Scale Bar Chart
FAKE(linspace(0,1,1))
CHART(
chartJSCode({
const data = generateData(5e5);
function generateData(count) {
let baseValue = Math.random() * 1000;
let time = +new Date(2011, 0, 1);
let smallBaseValue;
function next(idx) {
smallBaseValue =
idx % 30 === 0
? Math.random() * 700
: smallBaseValue + Math.random() * 500 - 250;
baseValue += Math.random() * 20 - 10;
return Math.max(0, Math.round(baseValue + smallBaseValue) + 3000);
}
const categoryData = [];
const valueData = [];
for (let i = 0; i < count; i++) {
categoryData.push(
echarts.format.formatTime('yyyy-MM-dd\nhh:mm:ss', time, false)
);
valueData.push(next(i).toFixed(2));
time += 1000;
}
return {
categoryData: categoryData,
valueData: valueData
};
}
}),
chartOption({
title: {
text: "500,000 Data",
left: 10
},
toolbox: {
feature: {
dataZoom: {
yAxisIndex: false
},
saveAsImage: {
pixelRatio: 2
}
}
},
tooltip: {
trigger: "axis",
axisPointer: {
type: "shadow"
}
},
grid: {
bottom: 90
},
dataZoom: [
{
"type": "inside"
},
{
"type": "slider"
}
],
xAxis: {
data: data.categoryData,
silent: false,
splitLine: {
show: false
},
splitArea: {
show: false
}
},
yAxis: {
splitArea: {
show: false
}
},
series: [
{
type: "bar",
data: data.valueData,
large: true
}
]
})
)
![](../../img/bar_largescale.jpg)
Last updated on