001    // --- BEGIN LICENSE BLOCK ---
002    /* 
003     * Copyright (c) 2009, Mikio L. Braun
004     * All rights reserved.
005     * 
006     * Redistribution and use in source and binary forms, with or without
007     * modification, are permitted provided that the following conditions are
008     * met:
009     * 
010     *     * Redistributions of source code must retain the above copyright
011     *       notice, this list of conditions and the following disclaimer.
012     * 
013     *     * Redistributions in binary form must reproduce the above
014     *       copyright notice, this list of conditions and the following
015     *       disclaimer in the documentation and/or other materials provided
016     *       with the distribution.
017     * 
018     *     * Neither the name of the Technische Universit?t Berlin nor the
019     *       names of its contributors may be used to endorse or promote
020     *       products derived from this software without specific prior
021     *       written permission.
022     * 
023     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
024     * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
025     * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
026     * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
027     * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
028     * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
029     * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
030     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
031     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
032     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
033     * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
034     */
035    // --- END LICENSE BLOCK ---
036    
037    package org.jblas.util;
038    
039    public class Functions {
040            public static double sinc(double x) {
041                    if (x == 0)
042                            return 1.0;
043                    else
044                            return Math.sin(Math.PI * x) / (Math.PI * x);
045            }
046    
047        public static int min(int a, int b) { return a < b ? a : b; }
048        public static int max(int a, int b) { return a > b ? a : b; }
049    }