@Override public DoubleArray apply(DoubleArray theta) { return trans.transform(theta); } };
@Override public DoubleArray apply(DoubleArray theta) { return trans.transform(theta); } };
/** * Transform from the N-1 "fit" parameters to the N "model" parameters. * @param fitParms The N-1 "fit" parameters * @return The N "model" parameters */ public DoubleArray transform(DoubleArray fitParms) { return DoubleArray.copyOf(transform(fitParms.toArray())); }
@Test public void inverseTransformTest() { for (int n = 2; n < 13; n++) { double[] theta = new double[n - 1]; for (int j = 0; j < n - 1; j++) { theta[j] = RANDOM.nextDouble() * Math.PI / 2; } SumToOne trans = new SumToOne(n); DoubleArray w = trans.transform(DoubleArray.copyOf(theta)); DoubleArray theta2 = trans.inverseTransform(w); for (int j = 0; j < n - 1; j++) { assertEquals("element " + j + ", of vector length " + n, theta[j], theta2.get(j), 1e-9); } } }
@Test public void transformTest() { for (int n = 2; n < 13; n++) { double[] from = new double[n - 1]; for (int j = 0; j < n - 1; j++) { from[j] = RANDOM.nextDouble() * Math.PI / 2; } SumToOne trans = new SumToOne(n); DoubleArray to = trans.transform(DoubleArray.copyOf(from)); assertEquals(n, to.size()); double sum = 0; for (int i = 0; i < n; i++) { sum += to.get(i); } assertEquals("vector length " + n, 1.0, sum, 1e-9); } }