@Test
public void testBasicFieldStats() {
Field f = Data.makeColumnField("a", "label", new Object[] {"1", "2", "a", "2", null, 0});
Field g = Data.makeColumnField("a", "label", new Object[] {100, 200, 400, 500, 600});
Field h = Data.makeColumnField("a", "label", new Object[] {"a", "b", "c", "c"});
Field i = Data.makeIndexingField("a", "label", 20);
Field c = Data.makeConstantField("a", "label", 5.0, 2000);
assertEquals(0, f.min(), 0.01);
assertEquals(2, f.max(), 0.01);
assertEquals(100, g.min(), 0.01);
assertEquals(600, g.max(), 0.01);
assertEquals(null, h.min());
assertEquals(null, h.max());
assertEquals(1, i.min(), 0.01);
assertEquals(20, i.max(), 0.01);
assertEquals(5.0, c.min(), 0.01);
assertEquals(5.0, c.max(), 0.01);
int[] counts = (int[]) h.property("categoryCounts");
Assert.assertEquals(1, counts[0]);
Assert.assertEquals(1, counts[1]);
Assert.assertEquals(2, counts[2]);
assertEquals(4, f.uniqueValuesCount());
assertEquals(5, g.uniqueValuesCount());
assertEquals(3, h.uniqueValuesCount());
assertEquals(20, i.uniqueValuesCount());
assertEquals(1, c.uniqueValuesCount());
}
@Test
public void testIndexing() {
Field a = Data.makeIndexingField("a", "b", 30);
assertEquals("a", a.name);
assertEquals("b", a.label);
assertEquals(30, a.rowCount());
assertEquals(30, a.getNumericProperty("valid"), 0.001);
assertEquals(30, a.getNumericProperty("validNumeric"), 0.001);
assertEquals(30, a.getNumericProperty("unique"), 0.001);
assertEquals(15.5, a.getNumericProperty("mean"), 0.001);
assertEquals(3, a.value(2));
assertEquals(8, a.value(7));
assertEquals(true, a.hasProperty("numeric"));
}
@Test
public void testPermute() {
Field base = Data.makeIndexingField("a", "b", 10);
Field a = Data.permute(base, new int[] {0, 0, 0, 1, 1, 2, 2, 3}, false);
assertEquals(true, a.hasProperty("numeric"));
assertEquals("a", a.name);
assertEquals("b", a.label);
assertEquals(8, a.rowCount());
assertEquals(8, a.getNumericProperty("valid"), 0.001);
assertEquals(8, a.getNumericProperty("validNumeric"), 0.001);
assertEquals(4, a.getNumericProperty("unique"), 0.001);
assertEquals((1 + 1 + 1 + 2 + 2 + 3 + 3 + 4) / 8.0, a.getNumericProperty("mean"), 0.001);
assertEquals(1, a.value(1));
assertEquals(1, a.value(2));
assertEquals(4, a.value(7));
assertEquals("1, 2, 3, 4", Data.join(a.categories()));
}