/*
title: Clustering Process
category: scatter
titleCN: 数据聚合
difficulty: 1
*/

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

var data = [
    [3.275154, 2.957587],
    [-3.344465, 2.603513],
    [0.355083, -3.376585],
    [1.852435, 3.547351],
    [-2.078973, 2.552013],
    [-0.993756, -0.884433],
    [2.682252, 4.007573],
    [-3.087776, 2.878713],
    [-1.565978, -1.256985],
    [2.441611, 0.444826],
    [-0.659487, 3.111284],
    [-0.459601, -2.618005],
    [2.17768, 2.387793],
    [-2.920969, 2.917485],
    [-0.028814, -4.168078],
    [3.625746, 2.119041],
    [-3.912363, 1.325108],
    [-0.551694, -2.814223],
    [2.855808, 3.483301],
    [-3.594448, 2.856651],
    [0.421993, -2.372646],
    [1.650821, 3.407572],
    [-2.082902, 3.384412],
    [-0.718809, -2.492514],
    [4.513623, 3.841029],
    [-4.822011, 4.607049],
    [-0.656297, -1.449872],
    [1.919901, 4.439368],
    [-3.287749, 3.918836],
    [-1.576936, -2.977622],
    [3.598143, 1.97597],
    [-3.977329, 4.900932],
    [-1.79108, -2.184517],
    [3.914654, 3.559303],
    [-1.910108, 4.166946],
    [-1.226597, -3.317889],
    [1.148946, 3.345138],
    [-2.113864, 3.548172],
    [0.845762, -3.589788],
    [2.629062, 3.535831],
    [-1.640717, 2.990517],
    [-1.881012, -2.485405],
    [4.606999, 3.510312],
    [-4.366462, 4.023316],
    [0.765015, -3.00127],
    [3.121904, 2.173988],
    [-4.025139, 4.65231],
    [-0.559558, -3.840539],
    [4.376754, 4.863579],
    [-1.874308, 4.032237],
    [-0.089337, -3.026809],
    [3.997787, 2.518662],
    [-3.082978, 2.884822],
    [0.845235, -3.454465],
    [1.327224, 3.358778],
    [-2.889949, 3.596178],
    [-0.966018, -2.839827],
    [2.960769, 3.079555],
    [-3.275518, 1.577068],
    [0.639276, -3.41284]
];

var CLUSTER_COUNT = 6;
var DIENSIION_CLUSTER_INDEX = 2;
var COLOR_ALL = [
    '#37A2DA', '#e06343', '#37a354', '#b55dba', '#b5bd48', '#8378EA', '#96BFFF'
];
var pieces = [];
for (var i = 0; i < CLUSTER_COUNT; i++) {
    pieces.push({
        value: i,
        label: 'cluster ' + i,
        color: COLOR_ALL[i]
    });
}

option = {
    dataset: [{
        source: data
    }, {
        transform: {
            type: 'ecStat:clustering',
            // print: true,
            config: {
                clusterCount: CLUSTER_COUNT,
                outputType: 'single',
                outputClusterIndexDimension: DIENSIION_CLUSTER_INDEX
            }
        }
    }],
    tooltip: {
        position: 'top'
    },
    visualMap: {
        type: 'piecewise',
        top: 'middle',
        min: 0,
        max: CLUSTER_COUNT,
        left: 10,
        splitNumber: CLUSTER_COUNT,
        dimension: DIENSIION_CLUSTER_INDEX,
        pieces: pieces
    },
    grid: {
        left: 120
    },
    xAxis: {
    },
    yAxis: {
    },
    series: {
        type: 'scatter',
        encode: { tooltip: [0, 1] },
        symbolSize: 15,
        itemStyle: {
            borderColor: '#555'
        },
        datasetIndex: 1
    }
};