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 theta matrix. Its rows correspond to document distributions over topics.
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*
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* @private
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* @returns {Matrix} theta parameter matrix
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*/
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function getThetas() {
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/* eslint-disable no-invalid-this */
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var Theta;
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var val;
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var d;
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var k;
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Theta = matrix( [ this.D, this.K ] );
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for ( d = 0; d < this.D; d++ ) {
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for ( k = 0; k < this.K; k++ ) {
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val = ( this.nd.get( d, k ) + this.alpha ) /
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( this.ndSum[ d ] + ( this.K*this.alpha ) );
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Theta.set( d, k, val );
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}
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}
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return Theta;
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}
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// EXPORTS //
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module.exports = getThetas;
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