/*
title: Logarithmic Regression
category: scatter
titleCN: 对数回归（使用统计插件）
difficulty: 16
*/


// See https://github.com/ecomfe/echarts-stat
echarts.registerTransform(ecStat.transform.regression);

option = {
    dataset: [{
        source: [
            [28604,77,17096869,'Australia',1990],
            [31163,77.4,27662440,'Canada',1990],
            [1516,68,1154605773,'China',1990],
            [13670,74.7,10582082,'Cuba',1990],
            [28599,75,4986705,'Finland',1990],
            [29476,77.1,56943299,'France',1990],
            [31476,75.4,78958237,'Germany',1990],
            [28666,78.1,254830,'Iceland',1990],
            [1777,57.7,870601776,'India',1990],
            [29550,79.1,122249285,'Japan',1990],
            [2076,67.9,20194354,'North Korea',1990],
            [12087,72,42972254,'South Korea',1990],
            [24021,75.4,3397534,'New Zealand',1990],
            [43296,76.8,4240375,'Norway',1990],
            [10088,70.8,38195258,'Poland',1990],
            [19349,69.6,147568552,'Russia',1990],
            [10670,67.3,53994605,'Turkey',1990],
            [26424,75.7,57110117,'United Kingdom',1990],
            [37062,75.4,252847810,'United States',1990],
            [44056,81.8,23968973,'Australia',2015],
            [43294,81.7,35939927,'Canada',2015],
            [13334,76.9,1376048943,'China',2015],
            [21291,78.5,11389562,'Cuba',2015],
            [38923,80.8,5503457,'Finland',2015],
            [37599,81.9,64395345,'France',2015],
            [44053,81.1,80688545,'Germany',2015],
            [42182,82.8,329425,'Iceland',2015],
            [5903,66.8,1311050527,'India',2015],
            [36162,83.5,126573481,'Japan',2015],
            [1390,71.4,25155317,'North Korea',2015],
            [34644,80.7,50293439,'South Korea',2015],
            [34186,80.6,4528526,'New Zealand',2015],
            [64304,81.6,5210967,'Norway',2015],
            [24787,77.3,38611794,'Poland',2015],
            [23038,73.13,143456918,'Russia',2015],
            [19360,76.5,78665830,'Turkey',2015],
            [38225,81.4,64715810,'United Kingdom',2015],
            [53354,79.1,321773631,'United States',2015]
        ]
    }, {
        transform: {
            type: 'filter',
            config: { dimension: 4, eq: 1990 }
        }
    }, {
        transform: {
            type: 'filter',
            config: { dimension: 4, eq: 2015 }
        }
    }, {
        transform: {
            type: 'ecStat:regression',
            config: {
                method: 'logarithmic'
            }
        }
    }],
    title: {
        text: '1990 and 2015 per capita life expectancy and GDP',
        subtext: 'By ecStat.regression',
        sublink: 'https://github.com/ecomfe/echarts-stat',
        left: 'center'
    },
    legend: {
        data: ['1990', '2015'],
        bottom: 10
    },
    tooltip: {
        trigger: 'axis',
        axisPointer: {
            type: 'cross'
        }
    },
    xAxis: {
        type: 'value',
        splitLine: {
            lineStyle: {
                type: 'dashed'
            }
        },
    },
    yAxis: {
        type: 'value',
        splitLine: {
            lineStyle: {
                type: 'dashed'
            }
        },
    },
    visualMap: {
        show: false,
        dimension: 2,
        min: 20000,
        max: 1500000000,
        seriesIndex: [0, 1],
        inRange: {
            symbolSize: [10, 70]
        }
    },
    series: [{
        name: '1990',
        type: 'scatter',
        datasetIndex: 1
        },{
        name: '2015',
        type: 'scatter',
        datasetIndex: 2
        }, {
        name: 'line',
        type: 'line',
        smooth: true,
        datasetIndex: 3,
        symbolSize: 0.1,
        symbol: 'circle',
        label: { show: true, fontSize: 16 },
        labelLayout: { dx: -20 },
        encode: { label: 2, tooltip: 1 }
    }]
}