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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="lib/esl.js"></script>
        <script src="lib/config.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="lib/facePrint.js"></script>
        <script src="lib/testHelper.js"></script>
        <script src="../dist/echarts.js"></script>
        <!-- <script src="ut/lib/canteen.js"></script> -->
        <link rel="stylesheet" href="lib/reset.css" />
    </head>
    <body>
        <style>
        </style>


        <div id="main_regression"></div>


        <script>

        require(['echarts', 'ecStat'], function (echarts, ecStat) {

            echarts.registerTransform(ecStat.transform.regression);

            var rawData = [
                [1, 4862.4],
                [2, 5294.7],
                [3, 5934.5],
                [4, 7171.0],
                [5, 8964.4],
                [6, 10202.2],
                [7, 11962.5],
                [8, 14928.3],
                [9, 16909.2],
                [10, 18547.9],
                [11, 21617.8],
                [12, 26638.1],
                [13, 34634.4],
                [14, 46759.4],
                [15, 58478.1],
                [16, 67884.6],
                [17, 74462.6],
                [18, 79395.7]
            ];

            var option = {
                dataset: [{
                    source: rawData
                }, {
                    transform: {
                        type: 'ecStat:regression',
                        config: {
                            method: 'exponential'
                        }
                    }
                }, {
                    fromDatasetIndex: 1,
                    fromTransformResult: 1
                }],
                legend: {
                    bottom: 20
                },
                tooltip: {
                },
                xAxis: {
                    type: 'category',
                },
                yAxis: {
                },
                series: [{
                    name: 'scatter',
                    type: 'scatter',
                    datasetIndex: 0
                }, {
                    name: 'regression',
                    type: 'line',
                    symbolSize: 0.1,
                    symbol: 'circle',
                    datasetIndex: 1,
                    label: { show: true, fontSize: 16 },
                    labelLayout: { dx: -20 },
                    encode: { label: 2, tooltip: 1 }
                }]
            };

            var chart = testHelper.create(echarts, 'main_regression', {
                title: [
                    'Regression: the **expression string** should be displayed',
                ],
                option: option
            });


        });

        </script>


    </body>
</html>