43 lines
1.2 KiB
JavaScript
43 lines
1.2 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.createIfft = void 0;
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var _array = require("../../utils/array.js");
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var _factory = require("../../utils/factory.js");
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var _is = require("../../utils/is.js");
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const name = 'ifft';
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const dependencies = ['typed', 'fft', 'dotDivide', 'conj'];
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const createIfft = exports.createIfft = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
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let {
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typed,
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fft,
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dotDivide,
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conj
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} = _ref;
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/**
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* Calculate N-dimensional inverse Fourier transform
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*
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* Syntax:
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*
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* math.ifft(arr)
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*
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* Examples:
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*
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* math.ifft([[2, 2], [0, 0]]) // returns [[{re:1, im:0}, {re:0, im:0}], [{re:1, im:0}, {re:0, im:0}]]
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*
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* See Also:
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*
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* fft
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*
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* @param {Array | Matrix} arr An array or matrix
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* @return {Array | Matrix} N-dimensional Fourier transformation of the array
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*/
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return typed(name, {
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'Array | Matrix': function (arr) {
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const size = (0, _is.isMatrix)(arr) ? arr.size() : (0, _array.arraySize)(arr);
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return dotDivide(conj(fft(conj(arr))), size.reduce((acc, curr) => acc * curr, 1));
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}
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});
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}); |