如何关闭 echarts 的自动放大功能？

Question

I want to display Ekg waves. I use echarts. But there is a small problem with the visualize.

My chart:

But I want to see like this page: https://www.arction.com/lightningchart-js-interactive-examples/examples/lcjs-example-0150-ecg.html

My code is here:

var chartDom = document.getElementById('main');
var myChart = echarts.init(chartDom);
var option;

option = {
    title: {
        text: '动态数据 + 时间坐标轴'
    },
    tooltip: {
        trigger: 'axis',
        axisPointer: {
            animation: false
        }
    },
    xAxis: {
        type: 'category',
        splitLine: {
            show: false
        }
    },
    yAxis: {
        type: 'value',
        boundaryGap: [0, '100%'],
        min: -1,
        max: 1,
        splitLine: {
            show: false
        }
    },
    series: [{
        name: '模拟数据',
        type: 'line',
        showSymbol: false,
        hoverAnimation: false,
        data: data
    }]
};

setInterval(function () {

    for (var i = 0; i < 5; i++) {
        data.shift();
        data.push(addData());
    }

    myChart.setOption({
        series: [{
            data: data
        }]
    });
}, 1000);

option && myChart.setOption(option);

So what do I need to set on the graph to show the whole thing from a distance instead of zooming in on the drawn part?

Answer 1

You not provided part of code where the bug: you should correct something in addData .

See fixed version.

 var chartDom = document.getElementById('main'); var myChart = echarts.init(chartDom); var start_date = new Date(2021, 0, 1); var data = []; var option; function randomData() { var date = start_date.setDate(start_date.getDate() + 1) return { name: date.toString(), value: [date, (Math.random() - 0.5) * 2] } } option = { title: { text: '动态数据 + 时间坐标轴' }, tooltip: { trigger: 'axis', axisPointer: { animation: false } }, xAxis: { type: 'time', splitLine: { show: false } }, yAxis: { type: 'value', boundaryGap: [0, '100%'], min: -1, max: 1, splitLine: { show: false } }, series: [{ name: '模拟数据', type: 'line', showSymbol: false, hoverAnimation: false, data: data }] }; setInterval(function() { if (data.length > 10) { data.shift() } data.push(randomData()); myChart.setOption({ series: [{ data: data }] }); }, 1000); myChart.setOption(option);

 <script src="https://cdn.jsdelivr.net/npm/echarts@4.9.0/dist/echarts.min.js"></script> <div id="main" style="width: 600px;height:400px;"></div>