def test_simple_loss_multiple_args(self):
# test that args and kwargs are both handled by optimizers
x0 = np.zeros(2), np.zeros(3)
ans = np.arange(2.), np.arange(3.)
opt = fmin_l_bfgs_b(simple_loss_multiple_args, x0)
opt = fmin_l_bfgs_b(simple_loss_multiple_args,
init_kwargs=dict(p=x0[0], q=x0[1]))
opt = fmin_l_bfgs_b(simple_loss_multiple_args,
init_args=x0[0],
init_kwargs=dict(q=x0[1]))
self.assertTrue(np.allclose(opt[0], ans[0]))
self.assertTrue(np.allclose(opt[1], ans[1]))
opt = fmin_cg(simple_loss_multiple_args, x0)
opt = fmin_cg(simple_loss_multiple_args,
init_kwargs=dict(p=x0[0], q=x0[1]))
opt = fmin_cg(simple_loss_multiple_args,
init_args=x0[0],
init_kwargs=dict(q=x0[1]))
self.assertTrue(np.allclose(opt[0], ans[0]))
self.assertTrue(np.allclose(opt[1], ans[1]))
opt = fmin_ncg(simple_loss_multiple_args, x0)
opt = fmin_ncg(simple_loss_multiple_args,
init_kwargs=dict(p=x0[0], q=x0[1]))
opt = fmin_ncg(simple_loss_multiple_args,
init_args=x0[0],
init_kwargs=dict(q=x0[1]))
self.assertTrue(np.allclose(opt[0], ans[0]))
self.assertTrue(np.allclose(opt[1], ans[1]))
def test_subtensor(self):
x0 = np.zeros(2)
ans = [-3, 4]
opt = fmin_l_bfgs_b(subtensor_loss, x0)
self.assertTrue(np.allclose(opt, ans))
opt = fmin_cg(subtensor_loss, x0)
self.assertTrue(np.allclose(opt, ans))
opt = fmin_ncg(subtensor_loss, x0)
self.assertTrue(np.allclose(opt, ans))
def test_L2(self):
x0 = np.zeros((5, 3))
ans = np.array([[+3.0, -1.0, -5.0], [+1.5, -0.5, -2.5], [
+0.0, 0.0, 0.0
], [-1.5, 0.5, 2.5], [-3.0, 1.0, 5.0]]) / 10.0
opt = fmin_l_bfgs_b(l2_loss, x0)
self.assertTrue(np.allclose(opt, ans))
opt = fmin_cg(l2_loss, x0)
self.assertTrue(np.allclose(opt, ans))
opt = fmin_ncg(l2_loss, x0)
self.assertTrue(np.allclose(opt, ans))
def test_L2(self):
x0 = np.zeros((5, 3))
ans = np.array([[+3.0, -1.0, -5.0],
[+1.5, -0.5, -2.5],
[+0.0, 0.0, 0.0],
[-1.5, 0.5, 2.5],
[-3.0, 1.0, 5.0]]) / 10.0
opt = fmin_l_bfgs_b(l2_loss, x0)
self.assertTrue(np.allclose(opt, ans))
opt = fmin_cg(l2_loss, x0)
self.assertTrue(np.allclose(opt, ans))
opt = fmin_ncg(l2_loss, x0)
self.assertTrue(np.allclose(opt, ans))