time-to-botec/squiggle/node_modules/@stdlib/nlp/lda/lib/avg_matrix.js
NunoSempere b6addc7f05 feat: add the node modules
Necessary in order to clearly see the squiggle hotwiring.
2022-12-03 12:44:49 +00:00

66 lines
1.4 KiB
JavaScript

/**
* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var matrix = require( './matrix.js' );
// MAIN //
/**
* Calculate weighted average of two matrices.
*
* @private
* @param {Matrix} A - first matrix
* @param {Matrix} B - second matrix
* @param {PositiveInteger} weight - relative weight of matrix A
* @returns {Matrix} averaged matrix
*/
function avgMatrix( A, B, weight ) {
var propA;
var propB;
var nrow;
var ncol;
var val;
var C;
var i;
var j;
nrow = A.shape[ 0 ];
ncol = A.shape[ 1 ];
C = matrix( [ nrow, ncol ] );
propA = ( weight - 1.0 ) / weight;
propB = 1.0 / weight;
for ( i = 0; i < nrow; i++ ) {
for ( j = 0; j < ncol; j++ ) {
val = (propA * A.get(i, j)) + (propB * B.get(i, j));
C.set( i, j, val );
}
}
return C;
}
// EXPORTS //
module.exports = avgMatrix;