66 lines
1.4 KiB
JavaScript
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;
|