def testId(self):
"""Test Dataset.idhash() if it gets changed if any of the
labels/chunks changes
"""
dataset = Dataset(samples=N.arange(12).reshape((4, 3)), labels=1, chunks=1)
origid = dataset.idhash
dataset.labels = [3, 1, 2, 3] # change all labels
self.failUnless(origid != dataset.idhash, msg="Changing all labels should alter dataset's idhash")
origid = dataset.idhash
z = dataset.labels[1]
self.failUnlessEqual(origid, dataset.idhash, msg="Accessing shouldn't change idhash")
z = dataset.chunks
self.failUnlessEqual(origid, dataset.idhash, msg="Accessing shouldn't change idhash")
z[2] = 333
self.failUnless(origid != dataset.idhash, msg="Changing value in attribute should change idhash")
origid = dataset.idhash
dataset.samples[1, 1] = 1000
self.failUnless(origid != dataset.idhash, msg="Changing value in data should change idhash")
origid = dataset.idhash
dataset.permuteLabels(True)
self.failUnless(origid != dataset.idhash, msg="Permutation also changes idhash")
dataset.permuteLabels(False)
self.failUnless(origid == dataset.idhash, msg="idhash should be restored after " "permuteLabels(False)")
def testLabelRandomizationAndSampling(self):
"""
"""
data = Dataset(samples=N.ones((5, 1)), labels=range(5), chunks=1)
data += Dataset(samples=N.ones((5, 1)) + 1, labels=range(5), chunks=2)
data += Dataset(samples=N.ones((5, 1)) + 2, labels=range(5), chunks=3)
data += Dataset(samples=N.ones((5, 1)) + 3, labels=range(5), chunks=4)
data += Dataset(samples=N.ones((5, 1)) + 4, labels=range(5), chunks=5)
self.failUnless(data.samplesperlabel == {0: 5, 1: 5, 2: 5, 3: 5, 4: 5})
sample = data.getRandomSamples(2)
self.failUnless(sample.samplesperlabel.values() == [2, 2, 2, 2, 2])
self.failUnless((data.uniquechunks == range(1, 6)).all())
# store the old labels
origlabels = data.labels.copy()
data.permuteLabels(True)
self.failIf((data.labels == origlabels).all())
data.permuteLabels(False)
self.failUnless((data.labels == origlabels).all())
# now try another object with the same data
data2 = Dataset(samples=data.samples, labels=data.labels, chunks=data.chunks)
# labels are the same as the originals
self.failUnless((data2.labels == origlabels).all())
# now permute in the new object
data2.permuteLabels(True)
# must not affect the old one
self.failUnless((data.labels == origlabels).all())
# but only the new one
self.failIf((data2.labels == origlabels).all())
