66 lines
1.4 KiB
JavaScript
66 lines
1.4 KiB
JavaScript
/**
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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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* Calculate weighted average of two matrices.
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*
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* @private
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* @param {Matrix} A - first matrix
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* @param {Matrix} B - second matrix
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* @param {PositiveInteger} weight - relative weight of matrix A
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* @returns {Matrix} averaged matrix
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*/
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function avgMatrix( A, B, weight ) {
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var propA;
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var propB;
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var nrow;
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var ncol;
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var val;
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var C;
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var i;
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var j;
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nrow = A.shape[ 0 ];
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ncol = A.shape[ 1 ];
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C = matrix( [ nrow, ncol ] );
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propA = ( weight - 1.0 ) / weight;
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propB = 1.0 / weight;
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for ( i = 0; i < nrow; i++ ) {
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for ( j = 0; j < ncol; j++ ) {
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val = (propA * A.get(i, j)) + (propB * B.get(i, j));
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C.set( i, j, val );
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}
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}
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return C;
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}
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// EXPORTS //
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module.exports = avgMatrix;
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