53 lines
1.9 KiB
JavaScript
53 lines
1.9 KiB
JavaScript
var __defProp = Object.defineProperty;
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var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
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var __getOwnPropNames = Object.getOwnPropertyNames;
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var __hasOwnProp = Object.prototype.hasOwnProperty;
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var __export = (target, all) => {
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for (var name in all)
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__defProp(target, name, { get: all[name], enumerable: true });
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};
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var __copyProps = (to, from, except, desc) => {
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if (from && typeof from === "object" || typeof from === "function") {
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for (let key of __getOwnPropNames(from))
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if (!__hasOwnProp.call(to, key) && key !== except)
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__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
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}
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return to;
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};
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
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var expMovingAvg_exports = {};
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__export(expMovingAvg_exports, {
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$expMovingAvg: () => $expMovingAvg
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});
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module.exports = __toCommonJS(expMovingAvg_exports);
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var import_util = require("../../util");
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var import_accumulator = require("../accumulator");
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var import_internal = require("./_internal");
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const $expMovingAvg = (_, collection, expr, options) => {
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const { input, N, alpha } = expr.inputExpr;
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(0, import_util.assert)(
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!(N && alpha),
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`You must specify either N or alpha. You cannot specify both.`
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);
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return (0, import_internal.withMemo)(
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collection,
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expr,
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() => {
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const series = (0, import_accumulator.$push)(collection, input, options).filter(import_util.isNumber);
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return series.length === collection.length ? series : null;
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},
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(series) => {
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if (series === null) return null;
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if (expr.documentNumber == 1) return series[0];
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const weight = N != void 0 ? 2 / (N + 1) : alpha;
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const i = expr.documentNumber - 1;
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series[i] = series[i] * weight + series[i - 1] * (1 - weight);
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return series[i];
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}
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);
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};
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// Annotate the CommonJS export names for ESM import in node:
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0 && (module.exports = {
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$expMovingAvg
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});
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