@Test
public void testStats() {
Dataset a = DatasetFactory.createRange(12, Dataset.FLOAT64);
assertEquals(11., a.max().doubleValue(), 1e-6);
assertEquals(0., a.min().doubleValue(), 1e-6);
assertEquals(5.5, ((Number) a.mean()).doubleValue(), 1e-6);
assertEquals(3.6055512754639891, a.stdDeviation().doubleValue(), 1e-6);
assertEquals(13., a.variance().doubleValue(), 1e-6);
a.setShape(3, 1, 4);
Dataset b = a.sum(0);
assertEquals(2, b.getRank());
assertArrayEquals(new int[] {1, 4}, b.getShape());
assertEquals(12., b.getDouble(0, 0), 1e-6);
assertEquals(15., b.getDouble(0, 1), 1e-6);
assertEquals(18., b.getDouble(0, 2), 1e-6);
assertEquals(21., b.getDouble(0, 3), 1e-6);
b = a.sum(1);
assertEquals(2, b.getRank());
assertArrayEquals(new int[] {3, 4}, b.getShape());
assertEquals(a.squeeze(), b);
a.setShape(3, 1, 4);
b = a.sum(2);
assertEquals(2, b.getRank());
assertArrayEquals(new int[] {3, 1}, b.getShape());
assertEquals(6., b.getDouble(0), 1e-6);
assertEquals(22., b.getDouble(1), 1e-6);
assertEquals(38., b.getDouble(2), 1e-6);
}
@Test
public void testPosition() {
double[] da = {0, 1, 2, 3, 4, 5, 6, 5, 4, 3, 2, 1};
DoubleDataset a = new DoubleDataset(da);
assertEquals(6, a.maxPos()[0]);
assertEquals(0, a.minPos()[0]);
Dataset b = DatasetFactory.zeros(new int[] {100, 200}, Dataset.FLOAT64);
b.set(100.00, new int[] {50, 100});
b.set(-100.00, new int[] {51, 101});
assertEquals(50, b.maxPos()[0]);
assertEquals(100, b.maxPos()[1]);
assertEquals(51, b.minPos()[0]);
assertEquals(101, b.minPos()[1]);
b.set(Double.NaN, new int[] {52, 53});
assertEquals(52, b.maxPos()[0]);
assertEquals(53, b.maxPos()[1]);
assertEquals(50, b.maxPos(true)[0]);
assertEquals(100, b.maxPos(true)[1]);
Dataset c = DatasetFactory.zeros(new int[] {100, 200}, Dataset.FLOAT64);
c.set(100.00, new int[] {99, 50});
c.set(99.99, new int[] {50, 50});
assertEquals(99, c.maxPos()[0]);
assertEquals(50, c.maxPos()[1]);
c.set(101, new int[] {0, 0});
assertEquals(0, c.maxPos()[0]);
assertEquals(0, c.maxPos()[1]);
}