チャート:近似曲線

TrendLine クラスは、通常のSeriesクラスを拡張し、選択したデータとパラメータに基づいて計算された系列を提供します。

近似曲線をチャートに追加するには、次の手順を実行します。

  1. 1つまたは複数のTrendLineオブジェクトを作成する
  2. bindingchartType、およびstyleのプロパティを設定するなど、TrendLineオブジェクトを通常のシリーズと同様に設定します。
  3. TrendLineのfitTypeおよびorderプロパティを設定して、作成する近似曲線のタイプを決定します。
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjChart from '@mescius/wijmo.chart'; import * as wjChartAnalytics from '@mescius/wijmo.chart.analytics'; import * as wjInput from '@mescius/wijmo.input'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create the chart let theChart = new wjChart.FlexChart('#theChart', { itemsSource: getData(), chartType: 'Scatter', axisY: { axisLine: true }, bindingX: 'x', series: [ { name: 'データ', binding: 'y' } ] }); // // show the equation on the chart let equation = document.getElementById('equation'); // // create a TrendLine and add it to the Chart series collection let trendLine = new wjChartAnalytics.TrendLine(); trendLine.binding = 'y'; trendLine.style = { stroke: 'darkred', strokeWidth: 3 }; trendLine.visibility = wjChart.SeriesVisibility.Hidden; theChart.series.push(trendLine); // // select trendline order let order = new wjInput.InputNumber('#order', { value: trendLine.order, step: 1, min: 1, max: 6, valueChanged: (s) => { if (s.value >= s.min && s.value <= s.max) { trendLine.order = s.value; showEquation(); } } }); // // select fit type let fitType = new wjInput.ComboBox('#fitType', { isRequired: false, placeholder: 'None', textChanged: (s) => { trendLine.name = s.text; if (s.text) { // show trendline trendLine.fitType = s.selectedIndex; trendLine.visibility = wjChart.SeriesVisibility.Visible; } else { // hide trendline trendLine.visibility = wjChart.SeriesVisibility.Hidden; } switch (s.text) { // enable/disable order input case '多項式': case 'フーリエ': order.isDisabled = false; break; default: order.isDisabled = true; break; } showEquation(); }, itemsSource: '直線,指数,対数,累乗,フーリエ,多項式,Xの最小,Yの最小,Xの最大,Yの最大,Xの平均,Yの平均'.split(',') }); // // show updated equation on a timeOut since the TrendLine update is async function showEquation() { equation.innerHTML = ''; setTimeout(() => equation.innerHTML = trendLine.getEquation(), 100); } // // randomize the data document.querySelector('#btnRandomize').addEventListener('click', () => { theChart.itemsSource = getData(); showEquation(); }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexChart Trendlines</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <label for="fitType">近似曲線の種類: </label> <div id="fitType"></div><br /> <label for="order">次数: </label> <div id="order"></div><br /> <label>式: </label> <div id="equation" class="equation"></div><br /> <label for="btnRandomize">データの生成</label> <button id="btnRandomize" class="btn btn-default"> 実行 </button> <div id="theChart"></div> </div> </body> </html>
// data sources export function getData() { let arr = [], cnt = 50, a = Math.random(), b = Math.random(); // for (let i = 1; i < cnt; i++) { arr.push({ x: i, y: a + i * b + i * Math.random() }); } // return arr; }
.wj-flexchart { height: 250px; margin: 10px 0; } .wj-control { margin-bottom: 3px; } label { width: 120px; text-align: right; } .equation { display: inline-block; font-style: italic; font-size: 80%; } .wj-combobox, .wj-inputnumber { width: 120px; margin-right: 12px; } body { margin-bottom: 24pt; }
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