本人接到一个对 EchartsK 线图的模拟任务，可惜对 JS 实在烂的无法直视，所以希望大家看看如何完成对 K 线图中的蜡状图的模拟。
这里大概有五组数据，分别是 K 线图、MA5、MA10、MA20、MA30，但主要不会对 K 线图的数据进行模拟.虽然知道 K 线图的数据由四个数据组成，但就是写不出来模拟央视..
模拟的数据如下:
var data0 = option.series[0].data;
var data1 = option.series[1].data;
var data2 = option.series[2].data;
var data3 = option.series[3].data;
data0.shift();
data0.push(2200+Math.random() * 100);//这里不知道该怎么写
data1.shift();
data1.push(2200+Math.random() * 100);
data2.shift();
data2.push(2200+Math.random() * 100);
data3.shift();
data3.push(2200+Math.random() * 100);另外也希望好心人讲解下这个X轴xAxis是如何实现原理的
/*option.xAxis[0].data.shift();
option.xAxis[0].data.push(axisData);最后附上完整代码，感激不尽:
<!DOCTYPE html>
<html style="height: 100%">
<head>
<meta charset="utf-8">
</head>
<body style="height: 100%; margin: 0">
<p id="container" style="height: 100%"></p>
<script type="text/javascript" src="http://cdn.bootcss.com/echarts/3.1.10/echarts.min.js"></script>
<script type="text/javascript">
var dom = document.getElementById("container");
var myChart = echarts.init(dom);
var app = {};
// 数据意义：开盘(open)，收盘(close)，最低(lowest)，最高(highest)
var data0 = splitData([
['2013/1/24', 2320.26,2320.26,2287.3,2362.94],
['2013/1/25', 2300,2291.3,2288.26,2308.38],
['2013/1/28', 2295.35,2346.5,2295.35,2346.92],
['2013/1/29', 2347.22,2358.98,2337.35,2363.8],
['2013/1/30', 2360.75,2382.48,2347.89,2383.76],
['2013/1/31', 2383.43,2385.42,2371.23,2391.82],
['2013/2/1', 2377.41,2419.02,2369.57,2421.15],
['2013/2/4', 2425.92,2428.15,2417.58,2440.38],
['2013/2/5', 2411,2433.13,2403.3,2437.42],
['2013/2/6', 2432.68,2434.48,2427.7,2441.73],
['2013/3/25', 2334.74,2326.72,2319.91,2344.89],
['2013/3/26', 2318.58,2297.67,2281.12,2319.99],
['2013/3/27', 2299.38,2301.26,2289,2323.48],
['2013/3/28', 2273.55,2236.3,2232.91,2273.55],
['2013/3/29', 2238.49,2236.62,2228.81,2246.87],
['2013/4/1', 2229.46,2234.4,2227.31,2243.95],
['2013/4/2', 2234.9,2227.74,2220.44,2253.42],
['2013/4/3', 2232.69,2225.29,2217.25,2241.34],
['2013/4/8', 2196.24,2211.59,2180.67,2212.59],
['2013/4/9', 2215.47,2225.77,2215.47,2234.73],
['2013/4/10', 2224.93,2226.13,2212.56,2233.04],
['2013/4/11', 2236.98,2219.55,2217.26,2242.48],
['2013/4/12', 2218.09,2206.78,2204.44,2226.26],
['2013/4/15', 2199.91,2181.94,2177.39,2204.99],
['2013/4/16', 2169.63,2194.85,2165.78,2196.43],
['2013/4/17', 2195.03,2193.8,2178.47,2197.51],
['2013/4/18', 2181.82,2197.6,2175.44,2206.03],
['2013/4/19', 2201.12,2244.64,2200.58,2250.11],
['2013/4/22', 2236.4,2242.17,2232.26,2245.12],
['2013/4/23', 2242.62,2184.54,2182.81,2242.62],
['2013/4/24', 2187.35,2218.32,2184.11,2226.12],
['2013/4/25', 2213.19,2199.31,2191.85,2224.63],
['2013/4/26', 2203.89,2177.91,2173.86,2210.58],
['2013/5/2', 2170.78,2174.12,2161.14,2179.65],
['2013/5/3', 2179.05,2205.5,2179.05,2222.81],
['2013/5/6', 2212.5,2231.17,2212.5,2236.07],
['2013/5/7', 2227.86,2235.57,2219.44,2240.26],
['2013/5/8', 2242.39,2246.3,2235.42,2255.21],
['2013/5/9', 2246.96,2232.97,2221.38,2247.86],
['2013/5/10', 2228.82,2246.83,2225.81,2247.67],
['2013/5/13', 2247.68,2241.92,2231.36,2250.85],
['2013/5/14', 2238.9,2217.01,2205.87,2239.93],
['2013/5/15', 2217.09,2224.8,2213.58,2225.19],
['2013/5/16', 2221.34,2251.81,2210.77,2252.87],
['2013/5/17', 2249.81,2282.87,2248.41,2288.09],
['2013/5/20', 2286.33,2299.99,2281.9,2309.39],
['2013/5/21', 2297.11,2305.11,2290.12,2305.3],
['2013/5/22', 2303.75,2302.4,2292.43,2314.18],
['2013/5/23', 2293.81,2275.67,2274.1,2304.95],
['2013/5/24', 2281.45,2288.53,2270.25,2292.59],
['2013/5/27', 2286.66,2293.08,2283.94,2301.7],
['2013/5/28', 2293.4,2321.32,2281.47,2322.1],
['2013/5/29', 2323.54,2324.02,2321.17,2334.33],
['2013/5/30', 2316.25,2317.75,2310.49,2325.72],
['2013/5/31', 2320.74,2300.59,2299.37,2325.53],
['2013/6/3', 2300.21,2299.25,2294.11,2313.43],
['2013/6/4', 2297.1,2272.42,2264.76,2297.1],
['2013/6/5', 2270.71,2270.93,2260.87,2276.86],
['2013/6/6', 2264.43,2242.11,2240.07,2266.69],
['2013/6/7', 2242.26,2210.9,2205.07,2250.63],
['2013/6/13', 2190.1,2148.35,2126.22,2190.1]
]);
function splitData(rawData) {
var categoryData = [];
var values = []
for (var i = 0; i < rawData.length; i++) {
categoryData.push(rawData[i].splice(0, 1)[0]);
values.push(rawData[i])
}
return {
categoryData: categoryData,
values: values
};
}
function calculateMA(dayCount) {
var result = [];
for (var i = 0, len = data0.values.length; i < len; i++) {
if (i < dayCount) {
result.push('-');
continue;
}
var sum = 0;
for (var j = 0; j < dayCount; j++) {
sum += data0.values[i - j][1];
}
result.push(sum / dayCount);
}
return result;
}
option = null;
option = {
title: {
text: '上证指数',
left: 0
},
tooltip: {
trigger: 'axis',
axisPointer: {
type: 'line'
}
},
legend: {
data: ['日K', 'MA5', 'MA10', 'MA20', 'MA30']
},
grid: {
left: '10%',
right: '10%',
bottom: '15%'
},
xAxis: {
type: 'category',
data: data0.categoryData,
scale: true,
boundaryGap : false,
axisLine: {onZero: false},//X/Y轴O刻度是否重合
splitLine: {show: false},//是否显示分割线
splitNumber: 20,//分割数量
min: 'dataMin',//坐标轴的最小刻目
max: 'dataMax'
},
yAxis: {
scale: true,
splitArea: {
show: true
}
},
dataZoom: [
{
type: 'inside',
start: 50,
end: 100
},
{
show: true,
type: 'slider',
y: '90%',
start: 50,
end: 100
}
],
series: [
{
name: '日K',
type: 'candlestick',
data: data0.values,
markPoint: {
label: {//标注文字
normal: {
formatter: function (param) {
return param != null ? Math.round(param.value) : ''; //判断param是不是有值，如果有，返回四舍五入后的值，如果没有就返回空
}
}
},
data: [
{
name: 'XX标点',
coord: ['2013/5/31', 2300],
value: 2300,
itemStyle: {
normal: {color: 'rgb(41,60,85)'}
}
},
{
name: 'highest value',
type: 'max',
valueDim: 'highest'
},
{
name: 'lowest value',
type: 'min',
valueDim: 'lowest'
},
{
name: 'average value on close',
type: 'average',
valueDim: 'close'
}
],
tooltip: {
formatter: function (param) {
return param.name + '<br>' + (param.data.coord || '');
}
}
},
markLine: {
symbol: ['none', 'none'],
data: [
[
{
name: 'from lowest to highest',
type: 'min',
valueDim: 'lowest',
symbol: 'circle',
symbolSize: 10,
label: {
normal: {show: false},
emphasis: {show: false}
}
},
{
type: 'max',
valueDim: 'highest',
symbol: 'circle',
symbolSize: 10,
label: {
normal: {show: false},
emphasis: {show: false}
}
}
],
{
name: 'min line on close',
type: 'min',
valueDim: 'close'
},
{
name: 'max line on close',
type: 'max',
valueDim: 'close'
}
]
}
},
{
name: 'MA5',
type: 'line',
data: calculateMA(5),
smooth: true,
lineStyle: {
normal: {opacity: 0.5}
}
},
{
name: 'MA10',
type: 'line',
data: calculateMA(10),
smooth: true,
lineStyle: {
normal: {opacity: 0.5}
}
},
{
name: 'MA20',
type: 'line',
data: calculateMA(20),
smooth: true,
lineStyle: {
normal: {opacity: 0.5}
}
},
{
name: 'MA30',
type: 'line',
data: calculateMA(30),
smooth: true,
lineStyle: {
normal: {opacity: 0.5}
}
},
]
};
clearInterval(app.timeTicket);
app.count = 11;
app.timeTicket = setInterval(function (){
axisData = (new Date()).toLocaleTimeString().replace(/^\D*/,'');
var data0 = option.series[0].data;
var data1 = option.series[1].data;
var data2 = option.series[2].data;
var data3 = option.series[3].data;
data0.shift();
data0.push(2200+Math.random() * 100);
data1.shift();
data1.push(2200+Math.random() * 100);
data2.shift();
data2.push(2200+Math.random() * 100);
data3.shift();
data3.push(2200+Math.random() * 100);
/*option.xAxis[0].data.shift();
option.xAxis[0].data.push(axisData);
option.xAxis[1].data.shift();
option.xAxis[1].data.push(app.count++);*/
myChart.setOption(option);
}, 2000);
;
if (option && typeof option === "object") {
var startTime = +new Date();
myChart.setOption(option, true);
var endTime = +new Date();
var updateTime = endTime - startTime;
console.log("Time used:", updateTime);
}
</script>
</body>
</html>
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