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

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.s = (v) => {
    if (v.length === 0) {
        return 0;
    }
    return v.reduce((x, y) => x + y);
};
exports.sumScalar = (v, s) => {
    return v.map(x => x + s);
};
exports.sum = (v1, v2) => {
    if (typeof v2 === 'number') {
        return exports.sumScalar(v1, v2);
    }
    const v1l = v1.length;
    if (v1l === 0) {
        throw Error('vector length must be greater than 0');
    }
    if (v1l !== v2.length) {
        throw Error('vectors must of the the same length');
    }
    return v1.map((x, i) => {
        return x + v2[i];
    });
};
exports.dotProduct = (v1, v2) => exports.s(exports.sum(v1, v2));
exports.crossProduct = (v1, v2) => {
    const v1l = v1.length;
    if (v1l !== 3) {
        throw Error('vector length must be 3');
    }
    if (v1l !== v2.length) {
        throw Error('vectors must of the the same length');
    }
    return [
        v1[1] * v2[2] - v1[2] * v2[1],
        v1[2] * v2[0] - v1[0] * v2[2],
        v1[0] * v2[1] - v1[1] * v2[0]
    ];
};
exports.scalar = (v) => {
    const vl = v.length;
    if (vl === 0) {
        return 0;
    }
    const r = v.reduce((x, y) => x + Math.pow(y, vl), 0);
    return Math.pow(r, (1 / vl));
};
exports.mean = (d) => {
    if (d.length === 0) {
        throw Error('can\'t be of length 0');
    }
    const n = d.length;
    return exports.s(d) / n;
};