47 lines
1011 B
JavaScript
47 lines
1011 B
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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/**
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* Computes the arithmetic mean of a numeric array.
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*
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* @private
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* @param {NumericArray} arr - input array
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* @returns {number} arithmetic mean
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*/
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function mean( arr ) {
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var delta;
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var len;
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var mu;
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var i;
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mu = 0.0;
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len = arr.length;
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for ( i = 0; i < len; i++ ) {
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delta = arr[ i ] - mu;
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mu += delta / (i+1);
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}
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return mu;
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}
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// EXPORTS //
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module.exports = mean;
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