Method testDigamma

JSAT/test/jsat/math/FastMathTest.java:199–212

Test of digamma method, of class FastMath.

()

     * Test of digamma method, of class FastMath.
     */
    @Test
    public void testDigamma()
    {
        System.out.println("digamma");
        DoubleList relErrs = new DoubleList();
        int trials = 10000;
        for(int i = 0; i < trials; i++)
        {
            double x = rand.nextDouble()*50;
            relErrs.add(relErr(SpecialMath.digamma(x), FastMath.digamma(x)));
        }
        Collections.sort(relErrs);
        assertTrue(relErrs.get((int) (trials*.95)) <= 1e-3);
    }
}