def update(self):
for i in range(self.n_users):
q = self.R[i, :] > 0
V_j = self.V[:, q]
Q = nps.matmul(V_j, V_j.T) + self.lambda_U * nps.identity(self.n_dims)
QQ = _instance().inv(Q)
Y = self.R[:, q][i, :]
YY = nps.matmul(Y, V_j.T)
self.U[:, i] = nps.matmul(QQ, YY)
def test_eye(nps_app_inst):
import nums.numpy as nps
assert nps_app_inst is not None
eyes = [
(10, 10),
(7, 10),
(10, 13),
]
for N, M in eyes:
ba: BlockArray = nps.eye(N, M)
np_arr = np.eye(N, M)
assert np.allclose(ba.get(), np_arr)
# Also test identity.
ba: BlockArray = nps.identity(N)
np_arr = np.identity(N)
assert np.allclose(ba.get(), np_arr)