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Create extramath.js

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Namhyeon Go 2022-11-06 21:32:03 +09:00 committed by GitHub
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// lib/extramath.js
// https://github.com/gnh1201/welsonjs
function DTM() {
this.data = [];
this.terms = [];
this.add = function(s) {
var w = s.trim().split(/\s+/);
for (var i = 0; i < w.length; i++) {
if (this.terms.indexOf(w[i]) < 0) this.terms.push(w[i]);
}
this.data.push(w);
};
this.toDTM = function() {
var dtm = [];
for (var i = 0; i < this.data.length; i++) {
var dt = [];
for (var k = 0; k < this.terms.length; k++) {
dt.push(this.data[i].indexOf(this.terms[k]) < 0 ? 0 : 1);
}
dtm.push(dt);
}
return dtm;
};
}
function cosineSim(A, B) {
var dotproduct = 0;
var mA = 0;
var mB = 0;
for (i = 0; i < A.length; i++) { // here you missed the i++
dotproduct += (A[i] * B[i]);
mA += (A[i] * A[i]);
mB += (B[i] * B[i]);
}
mA = Math.sqrt(mA);
mB = Math.sqrt(mB);
var similarity = (dotproduct) / ((mA)*(mB)) // here you needed extra brackets
return similarity;
}
exports.DTM = DTM;
exports.cosineSim = cosineSim;
exports.VERSIONINFO = "ExtraMath module (extramath.js) version 0.0.1";
exports.AUTHOR = "catswords@protonmail.com";
exports.global = global;
exports.require = global.require;