Java tutorial
/* * Copyright (c) 2013 Faculty of Computer Science, University of Vienna * * 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. */ package univie.cs.pps.utils; import org.apache.commons.math3.stat.descriptive.SummaryStatistics; /** * A subclass of {@link SummaryStatistics} for convenient printing of a table of * statistics. * * @author Dario Seidl * */ public class FormattedStatistics extends SummaryStatistics { /** * Returns a string containing the character {@code c} repeated * {@code repeat} times. */ public static String repeatChar(char c, int repeat) { return (new String(new char[repeat])).replace('\0', c); } /** * Returns a header with column names, matching the format of the * {@code toString} implementation of this class. */ public static String header() { return String.format("%8s %16s %16s %16s %16s %16s", "n", "min", "max", "mean", "std", "rms"); } /** * Returns a header with column names, each followed by {@code suffix}, * matching the format of the {@code toString} implementation of this class. */ public static String header(String suffix) { return String.format("%8s %16s %16s %16s %16s %16s", "n" + suffix, "min" + suffix, "max" + suffix, "mean" + suffix, "std" + suffix, "rms" + suffix); } /** * Returns the root-mean-square of the values that have been added. */ public double getRMS() { return Math.sqrt(getSumsq() / getN()); } /** * Returns a string of the following statistics of the added values: count, * minimum, maximum, mean, standard deviation, and root-mean-square. */ @Override public String toString() { return String.format("%8d %16e %16e %16e %16e %16e", getN(), getMin(), getMax(), getMean(), getStandardDeviation(), getRMS()); } }