def testQgsClassificationLogarithmic_FilterZeroNeg(self):
values = [-2, 0, 1, 7, 66, 555, 4444]
vl = createMemoryLayer(values)
m = QgsClassificationLogarithmic()
m.setParameterValues({'ZERO_NEG_VALUES_HANDLE': QgsClassificationLogarithmic.Discard})
r = m.classes(vl, 'value', 4)
self.assertEqual(len(r), 4)
self.assertEqual(r[0].label(), '1 - 10^1')
self.assertEqual(QgsClassificationMethod.rangesToBreaks(r), [10.0, 100.0, 1000.0, 10000.0])
m.setParameterValues({'ZERO_NEG_VALUES_HANDLE': QgsClassificationLogarithmic.PrependBreak})
r = m.classes(vl, 'value', 4)
self.assertEqual(r[0].label(), '-2 - 10^0')
self.assertEqual(QgsClassificationMethod.rangesToBreaks(r), [1.0, 10.0, 100.0, 1000.0, 10000.0])
def testQgsClassificationFixedIntervalInvalidInterval(self):
values = [-33, -41, -43, 16, 29, 9, -35, 57, 26, -30]
vl = createMemoryLayer(values)
m = QgsClassificationFixedInterval()
m.setParameterValues({'INTERVAL': 0})
r = m.classes(vl, 'value', 4)
self.assertEqual(len(r), 1)
self.assertEqual(QgsClassificationMethod.rangesToBreaks(r), [57.0])
def testQgsClassificationJenksSimple(self):
# This is a simple Natural Breaks Jenks test checking if simple calculation can be done
# when number of values is below 3000 (value hardcoded in qgsclassificationjenks.h)
# And if returned values are consistent (the same as at the time of creation of this test)
values = [-33, -41, -43, 16, 29, 9, -35, 57, 26, -30]
vl = createMemoryLayer(values)
m = QgsClassificationJenks()
r = m.classes(vl, 'value', 4)
self.assertEqual(len(r), 4)
self.assertEqual(QgsClassificationMethod.rangesToBreaks(r),
[-30.0, 16.0, 29.0, 57.0])
def testQgsClassificationJenksHighNumber(self):
# This test checks if Jenkis classification does not crash when number of
# values in a set is higher than 3000 (value hardcoded in qgsclassificationjenks.h)
# And if returned values are consistent (the same as at the time of creation of this test)
random.seed(42 * 42)
values = [random.randint(-1000, 1000) for _ in range(5000)]
vl = createMemoryLayer(values)
m = QgsClassificationJenks()
r = m.classes(vl, 'value', 4)
self.assertEqual(len(r), 4)
self.assertEqual(QgsClassificationMethod.rangesToBreaks(r),
[-506.0, -4.0, 499.0, 1000.0])
def testQgsClassificationLogarithmic_FilterZeroNeg(self):
values = [-2, 0, 1, 7, 66, 555, 4444]
vl = createMemoryLayer(values)
m = QgsClassificationLogarithmic()
m.setParameterValues({'FILTER_ZERO_NEG_VALUES': True})
r = m.classes(vl, 'value', 4)
self.assertEqual(len(r), 4)
self.assertEqual(r[0].label(), '1 - 10^1')
self.assertEqual(QgsClassificationMethod.rangesToBreaks(r),
[10.0, 100.0, 1000.0, 10000.0])
def testQgsClassificationLogarithmic(self):
values = [
2746.71, 66667.49, 77282.52, 986567.01, 1729508.41, 9957836.86,
35419826.29, 52584164.80, 296572842.00
]
vl = createMemoryLayer(values)
m = QgsClassificationLogarithmic()
r = m.classes(vl, 'value', 8)
self.assertEqual(len(r), 6)
self.assertEqual(r[0].label(),
'{} - 10^4'.format(QLocale().toString(2746.71)))
self.assertEqual(QgsClassificationMethod.rangesToBreaks(r), [
10000.0, 100000.0, 1000000.0, 10000000.0, 100000000.0, 1000000000.0
])
self.assertEqual(len(m.classes(vl, 'value', 4)), 4)