Example usage for java.util Random doubles

Introduction

In this page you can find the example usage for java.util Random doubles.

Prototype

public DoubleStream doubles(long streamSize) 

Source Link

Document

Returns a stream producing the given streamSize number of pseudorandom double values, each between zero (inclusive) and one (exclusive).

Usage

From source file:com.wormsim.utils.TrackedScalar.java

public static void main2(String[] args) {
    timerStart();/*from   w w  w  .  ja v a  2  s . com*/
    final int walker_no = 1024;
    final int iter_no = 100;
    final List<List<Double>> data = new ArrayList<>(walker_no);
    final Random rng = new Random();
    for (int i = 0; i < walker_no; i++) {
        data.add(rng.doubles(iter_no).map((d) -> logit(d)).boxed().collect(Collectors.toList()));
    }
    double B, W, var, R;
    timer("Generated Data");
    W = calcWithinVarianceA(data);
    timer("Time Taken");
    B = calcBetweenVarianceA(data);
    timer("Time Taken");
    var = calcVar(iter_no, B, W);
    R = calcR(iter_no, B, W);
    timer("Time Taken");
    W = calcWithinVarianceB(data);
    timer("Time Taken");
    B = calcBetweenVarianceB(data);
    timer("Time Taken");
    var = calcVar(iter_no, B, W);
    R = calcR(iter_no, B, W);
    timer("Time Taken");
}

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From source file:org.mpetnuch.gauss.linearalgebra.blas3.JBlasLevel3Test.java

private static double[][] generateData(int m, int n) {
    final Random randomStream = new Random((long) m * n);
    final double[][] data = new double[m][];
    Arrays.setAll(data, value -> randomStream.doubles(n).toArray());
    return data;/*  www .  jav  a  2s.  c  o m*/
}

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