time-to-botec

Benchmark sampling in different programming languages
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get_thetas.js (1244B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2018 The Stdlib Authors.
      5 *
      6 * Licensed under the Apache License, Version 2.0 (the "License");
      7 * you may not use this file except in compliance with the License.
      8 * You may obtain a copy of the License at
      9 *
     10 *    http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing, software
     13 * distributed under the License is distributed on an "AS IS" BASIS,
     14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15 * See the License for the specific language governing permissions and
     16 * limitations under the License.
     17 */
     18 
     19 'use strict';
     20 
     21 // MODULES //
     22 
     23 var matrix = require( './matrix.js' );
     24 
     25 
     26 // MAIN //
     27 
     28 /**
     29 * Get theta matrix. Its rows correspond to document distributions over topics.
     30 *
     31 * @private
     32 * @returns {Matrix} theta parameter matrix
     33 */
     34 function getThetas() {
     35 	/* eslint-disable no-invalid-this */
     36 	var Theta;
     37 	var val;
     38 	var d;
     39 	var k;
     40 
     41 	Theta = matrix( [ this.D, this.K ] );
     42 	for ( d = 0; d < this.D; d++ ) {
     43 		for ( k = 0; k < this.K; k++ ) {
     44 			val = ( this.nd.get( d, k ) + this.alpha ) /
     45 				( this.ndSum[ d ] + ( this.K*this.alpha ) );
     46 			Theta.set( d, k, val );
     47 		}
     48 	}
     49 	return Theta;
     50 }
     51 
     52 
     53 // EXPORTS //
     54 
     55 module.exports = getThetas;