@nexys/math-ts/dist/linest.js

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.linest = (series) => {
    const n = series.length;
    if (n < 1) {
        throw Error('series length must be greater than zero');
    }
    const sumY = series.map(_ => _.y).reduce((a, b) => a + b);
    const sumX = series.map(_ => _.x).reduce((a, b) => a + b);
    const sumX2 = series.map(_ => Math.pow(_.x, 2)).reduce((a, b) => a + b);
    const sumXY = series.map(_ => _.x * _.y).reduce((a, b) => a + b);
    const denom = n * sumX2 - Math.pow(sumX, 2);
    const a = (n * sumXY - sumY * sumX) / denom;
    const b = (sumY * sumX2 - sumX * sumXY) / denom;
    return { a, b };
};
exports.estimatedY = (xs, { a, b }) => xs.map(x => {
    return { y: a * x + b, x };
});