co.turnus.analysis.util.AnalysisUtil.java Source code

Introduction

Here is the source code for co.turnus.analysis.util.AnalysisUtil.java

Source

/* 
 * TURNUS, the co-exploration framework
 * 
 * Copyright (C) 2014 EPFL SCI STI MM
 *
 * This file is part of TURNUS.
 *
 * TURNUS is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * TURNUS is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with TURNUS.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Additional permission under GNU GPL version 3 section 7
 * 
 * If you modify this Program, or any covered work, by linking or combining it
 * with Eclipse (or a modified version of Eclipse or an Eclipse plugin or 
 * an Eclipse library), containing parts covered by the terms of the 
 * Eclipse Public License (EPL), the licensors of this Program grant you 
 * additional permission to convey the resulting work.  Corresponding Source 
 * for a non-source form of such a combination shall include the source code 
 * for the parts of Eclipse libraries used as well as that of the  covered work.
 * 
 */
package co.turnus.analysis.util;

import java.util.LinkedHashSet;
import java.util.Set;

import org.apache.commons.lang.ArrayUtils;
import org.apache.commons.math3.util.Precision;

public class AnalysisUtil {

    public static final int PRECISION_SCALE = 4;
    public static final double PRECISION_EPS = Math.pow(10, -PRECISION_SCALE);

    public static boolean equals(double a, double b) {
        return Precision.equals(a, b, PRECISION_EPS);
    }

    public static double[] linspaced(double min, double max, int points) {
        Set<Double> values = new LinkedHashSet<Double>();
        double current = min;
        double delta = (max - min) / ((double) points - 1);
        do {
            values.add(current);
            current += delta;

        } while (current < (max + delta / 2));
        return ArrayUtils.toPrimitive(values.toArray(new Double[0]));
    }

    public static int[] linspacei(int min, int max) {
        Set<Integer> values = new LinkedHashSet<Integer>();
        for (int i = min; i <= max; i++) {
            values.add(i);
        }
        return ArrayUtils.toPrimitive(values.toArray(new Integer[0]));
    }

    public static int[] linspacei(int min, int max, int points) {
        Set<Integer> values = new LinkedHashSet<Integer>();
        values.add(min);
        for (double d : linspaced(min, max, points)) {
            values.add((int) Math.floor(d));
        }
        values.add(max);
        return ArrayUtils.toPrimitive(values.toArray(new Integer[0]));
    }

    public static double round(double a) {
        return Precision.round(a, PRECISION_SCALE);
    }

}