Function getStats

docs/app/js/sanddance-app.js:2101–2127

(data, column)

    column.isColorData = true;
}
function getStats(data, column) {
    const distinctMap = {};
    const stats = {
        distinctValueCount: null,
        max: null,
        mean: null,
        min: null
    };
    let sum = 0;
    for(let i = 0; i < data.length; i++){
        let row = data[i];
        let value = row[column.name];
        distinctMap[value] = true;
        if (stats.max === null || value > stats.max) stats.max = value;
        if (stats.min === null || value < stats.min) stats.min = value;
        let num = +value;
        if (!isNaN(num)) sum += num;
        if (column.type === "string" && !stats.hasColorData && isColor(value)) stats.hasColorData = true;
    }
    if (column.quantitative) {
        stats.mean = data.length > 0 && sum / data.length;
        stats.hasNegative = detectNegative(column, data);
        if (column.type === "integer") stats.isSequential = detectSequentialColumn(column, data);
    }
    stats.distinctValueCount = Object.keys(distinctMap).length;
    return stats;
}
function detectNegative(column, data) {
    for(let i = 1; i < data.length; i++){
        if (data[i][column.name] < 0) return true;