001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.math3.random;
019
020/**
021 * This interface represent a normalized random generator for
022 * scalars.
023 * Normalized generator provide null mean and unit standard deviation scalars.
024 * @version $Id: NormalizedRandomGenerator.java 1416643 2012-12-03 19:37:14Z tn $
025 * @since 1.2
026 */
027public interface NormalizedRandomGenerator {
028
029  /** Generate a random scalar with null mean and unit standard deviation.
030   * <p>This method does <strong>not</strong> specify the shape of the
031   * distribution, it is the implementing class that provides it. The
032   * only contract here is to generate numbers with null mean and unit
033   * standard deviation.</p>
034   * @return a random scalar with null mean and unit standard deviation
035   */
036  double nextNormalizedDouble();
037
038}