Java tutorial
//package com.java2s; /* * The MIT License * * Copyright (c) 2009 The Broad Institute * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ public class Main { private static final int QUALITY_MASK = 0x3f; /** * Convert a pair of likelihoods into a value suitable for passing to baseAndProbDiffToSqValue. * @param secondBestLikelihood Probability of the 2nd-best base call. 1 > secondBestLikelihood > thirdBestLikelihood. * @param thirdBestLikelihood Probability of the 3rd-best base call. thirdBestLikelihood > 0. * @return ratio of input probabilities for storing in SQ tag. */ public static byte sqScaledProbabilityRatio(final double secondBestLikelihood, final double thirdBestLikelihood) { if (secondBestLikelihood >= 1.0 || thirdBestLikelihood <= 0 || thirdBestLikelihood > secondBestLikelihood) { throw new IllegalArgumentException("Likelihoods out of range. second best: " + secondBestLikelihood + "; third best: " + thirdBestLikelihood); } // Cap value at QUALITY_MASK return (byte) (Math.min(Math.round(-10.0 * Math.log10(thirdBestLikelihood / secondBestLikelihood)), QUALITY_MASK)); } }