56 lines
1.2 KiB
JavaScript
56 lines
1.2 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var matrix = require( './matrix.js' );
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// MAIN //
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/**
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* Get the phi matrix. Each row is a topic distribution over words.
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*
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* @private
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* @returns {Matrix} phi parameter matrix
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*/
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function getPhis() {
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/* eslint-disable no-invalid-this */
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var Phi;
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var val;
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var k;
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var w;
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Phi = matrix( [ this.K, this.W ] );
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for ( k = 0; k < this.K; k++ ) {
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for ( w = 0; w < this.W; w++ ) {
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val = ( this.nw.get( w, k ) + this.beta ) /
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( this.nwSum[ k ] + ( this.W*this.beta ) );
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Phi.set( k, w, val );
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}
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}
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return Phi;
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}
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// EXPORTS //
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module.exports = getPhis;
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