Examples of org.apache.commons.math3.random.MersenneTwister.nextDouble()

Class org.apache.commons.math3.random.MersenneTwister

Examples of org.apache.commons.math3.random.MersenneTwister.nextDouble()

org.apache.commons.math3.random.MersenneTwister.nextDouble()
Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence. @return the next pseudorandom, uniformly distributeddouble value between 0.0 and 1.0 from this random number generator's sequence

        Well1024a random = new Well1024a(553267312521321234l);
        for (int i = 0; i < 10000; ++i) {
            double ux = 10000 * random.nextDouble();
            double uy = 10000 * random.nextDouble();
            double uz = 10000 * random.nextDouble();
            double vx = 10000 * random.nextDouble();
            double vy = 10000 * random.nextDouble();
            double vz = 10000 * random.nextDouble();
            double sNaive = ux * vx + uy * vy + uz * vz;


            FieldVector3D<DerivativeStructure> uds = createVector(ux, uy, uz, 3);

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        for (int i = 0; i < 10000; ++i) {
            double ux = 10000 * random.nextDouble();
            double uy = 10000 * random.nextDouble();
            double uz = 10000 * random.nextDouble();
            double vx = 10000 * random.nextDouble();
            double vy = 10000 * random.nextDouble();
            double vz = 10000 * random.nextDouble();
            double sNaive = ux * vx + uy * vy + uz * vz;


            FieldVector3D<DerivativeStructure> uds = createVector(ux, uy, uz, 3);
            FieldVector3D<DerivativeStructure> vds = createVector(vx, vy, vz, 3);

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            double ux = 10000 * random.nextDouble();
            double uy = 10000 * random.nextDouble();
            double uz = 10000 * random.nextDouble();
            double vx = 10000 * random.nextDouble();
            double vy = 10000 * random.nextDouble();
            double vz = 10000 * random.nextDouble();
            double sNaive = ux * vx + uy * vy + uz * vz;


            FieldVector3D<DerivativeStructure> uds = createVector(ux, uy, uz, 3);
            FieldVector3D<DerivativeStructure> vds = createVector(vx, vy, vz, 3);
            Vector3D v = new Vector3D(vx, vy, vz);

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    public void testCrossProduct() {
        // we compare accurate versus naive cross product implementations
        // on regular vectors (i.e. not extreme cases like in the previous test)
        Well1024a random = new Well1024a(885362227452043214l);
        for (int i = 0; i < 10000; ++i) {
            double ux = random.nextDouble();
            double uy = random.nextDouble();
            double uz = random.nextDouble();
            double vx = random.nextDouble();
            double vy = random.nextDouble();
            double vz = random.nextDouble();

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        // we compare accurate versus naive cross product implementations
        // on regular vectors (i.e. not extreme cases like in the previous test)
        Well1024a random = new Well1024a(885362227452043214l);
        for (int i = 0; i < 10000; ++i) {
            double ux = random.nextDouble();
            double uy = random.nextDouble();
            double uz = random.nextDouble();
            double vx = random.nextDouble();
            double vy = random.nextDouble();
            double vz = random.nextDouble();
            Vector3D cNaive = new Vector3D(uy * vz - uz * vy, uz * vx - ux * vz, ux * vy - uy * vx);

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        // on regular vectors (i.e. not extreme cases like in the previous test)
        Well1024a random = new Well1024a(885362227452043214l);
        for (int i = 0; i < 10000; ++i) {
            double ux = random.nextDouble();
            double uy = random.nextDouble();
            double uz = random.nextDouble();
            double vx = random.nextDouble();
            double vy = random.nextDouble();
            double vz = random.nextDouble();
            Vector3D cNaive = new Vector3D(uy * vz - uz * vy, uz * vx - ux * vz, ux * vy - uy * vx);

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        Well1024a random = new Well1024a(885362227452043214l);
        for (int i = 0; i < 10000; ++i) {
            double ux = random.nextDouble();
            double uy = random.nextDouble();
            double uz = random.nextDouble();
            double vx = random.nextDouble();
            double vy = random.nextDouble();
            double vz = random.nextDouble();
            Vector3D cNaive = new Vector3D(uy * vz - uz * vy, uz * vx - ux * vz, ux * vy - uy * vx);


            FieldVector3D<DerivativeStructure> uds = createVector(ux, uy, uz, 3);

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        for (int i = 0; i < 10000; ++i) {
            double ux = random.nextDouble();
            double uy = random.nextDouble();
            double uz = random.nextDouble();
            double vx = random.nextDouble();
            double vy = random.nextDouble();
            double vz = random.nextDouble();
            Vector3D cNaive = new Vector3D(uy * vz - uz * vy, uz * vx - ux * vz, ux * vy - uy * vx);


            FieldVector3D<DerivativeStructure> uds = createVector(ux, uy, uz, 3);
            FieldVector3D<DerivativeStructure> vds = createVector(vx, vy, vz, 3);

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            double ux = random.nextDouble();
            double uy = random.nextDouble();
            double uz = random.nextDouble();
            double vx = random.nextDouble();
            double vy = random.nextDouble();
            double vz = random.nextDouble();
            Vector3D cNaive = new Vector3D(uy * vz - uz * vy, uz * vx - ux * vz, ux * vy - uy * vx);


            FieldVector3D<DerivativeStructure> uds = createVector(ux, uy, uz, 3);
            FieldVector3D<DerivativeStructure> vds = createVector(vx, vy, vz, 3);
            Vector3D v = new Vector3D(vx, vy, vz);

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    public void testDotProduct() {
        // we compare accurate versus naive dot product implementations
        // on regular vectors (i.e. not extreme cases like in the previous test)
        Well1024a random = new Well1024a(553267312521321234l);
        for (int i = 0; i < 10000; ++i) {
            double ux = 10000 * random.nextDouble();
            double uy = 10000 * random.nextDouble();
            double uz = 10000 * random.nextDouble();
            double vx = 10000 * random.nextDouble();
            double vy = 10000 * random.nextDouble();
            double vz = 10000 * random.nextDouble();

View Full Code Here

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