@stdlib/random-base-normal/lib/normal.js

Normally distributed pseudorandom numbers.

/**
* @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';

/**
* Returns a pseudorandom number from a normal distribution with parameters `mu` and `sigma`.
*
* @private
* @param {PRNG} rand - pseudorandom number generator
* @param {number} mu - mean
* @param {PositiveNumber} sigma - standard deviation
* @returns {number} pseudorandom number
*/
function normal( rand, mu, sigma ) {
	return mu + (sigma*rand());
}


// EXPORTS //

module.exports = normal;