def test_simple_som(self):
colors = np.array(
[
[0.0, 0.0, 0.0],
[0.0, 0.0, 1.0],
[0.0, 1.0, 0.0],
[1.0, 0.0, 0.0],
[0.0, 1.0, 1.0],
[1.0, 0.0, 1.0],
[1.0, 1.0, 0.0],
[1.0, 1.0, 1.0],
]
)
# only small SOM for speed reasons
som = SimpleSOMMapper((10, 5), 200, learning_rate=0.05)
# no acces when nothing is there
self.failUnlessRaises(RuntimeError, som._access_kohonen)
som.train(colors)
fmapped = som.forward(colors)
self.failUnless(fmapped.shape == (8, 2))
# reverse mapping
rmapped = som.reverse(fmapped)
if cfg.getboolean("tests", "labile", default="yes"):
# should approximately restore the input, but could fail
# with bad initialisation
self.failUnless((np.round(rmapped) == colors).all())
def testSimpleSOM(self):
colors = [[0., 0., 0.], [0., 0., 1.], [0., 1., 0.],
[1., 0., 0.], [0., 1., 1.], [1., 0., 1.],
[1., 1., 0.], [1., 1., 1.]]
ds = Dataset(samples=colors, labels=1)
# only small SOM for speed reasons
som = SimpleSOMMapper((10, 5), 200, learning_rate=0.05)
# no acces when nothing is there
self.failUnlessRaises(RuntimeError, som._accessKohonen)
self.failUnlessRaises(RuntimeError, som.getInSize)
self.failUnlessRaises(RuntimeError, som.getOutSize)
som.train(ds)
self.failUnless(som.getInSize() == 3)
self.failUnless(som.getOutSize() == (10,5))
fmapped = som(colors)
self.failUnless(fmapped.shape == (8, 2))
for fm in fmapped:
self.failUnless(som.isValidOutId(fm))
# reverse mapping
rmapped = som.reverse(fmapped)
if cfg.getboolean('tests', 'labile', default='yes'):
# should approximately restore the input, but could fail
# with bas initialisation
self.failUnless((N.round(rmapped) == ds.samples).all())
def test_simple_som(self):
colors = np.array([[0., 0., 0.], [0., 0., 1.], [0., 1., 0.],
[1., 0., 0.], [0., 1., 1.], [1., 0., 1.],
[1., 1., 0.], [1., 1., 1.]])
# only small SOM for speed reasons
som = SimpleSOMMapper((10, 5), 200, learning_rate=0.05)
# no acces when nothing is there
self.failUnlessRaises(RuntimeError, som._access_kohonen)
som.train(colors)
fmapped = som(colors)
self.failUnless(fmapped.shape == (8, 2))
# reverse mapping
rmapped = som.reverse(fmapped)
if cfg.getboolean('tests', 'labile', default='yes'):
# should approximately restore the input, but could fail
# with bad initialisation
self.failUnless((np.round(rmapped) == colors).all())
