Python svd_rand Examples

Example #1

File: test_la.py Project: kabicm/ctf

 def test_svd_rand(self):
     m = 19
     n = 15
     k = 13
     for dt in [numpy.float32, numpy.float64, numpy.complex64, numpy.complex128]:
         A = ctf.random.random((m,n))
         A = ctf.astensor(A,dtype=dt)
         [U,S,VT]=ctf.svd_rand(A,k,5,1)
         self.assertTrue(allclose(ctf.eye(k),ctf.dot(U.T(),U)))
         self.assertTrue(allclose(ctf.eye(k),ctf.dot(VT,VT.T())))
         [U2,S2,VT2]=ctf.svd(A,k)
         rs1 = ctf.vecnorm(A - ctf.dot(U*S,VT))
         rs2 = ctf.vecnorm(A - ctf.dot(U2*S2,VT2))
         rA = ctf.vecnorm(A)
         self.assertTrue(rs1 < rA)
         self.assertTrue(rs2 < rs1)
         self.assertTrue(numpy.abs(rs1 - rs2)<3.e-1)

Example #2

File: ctf_ext.py Project: cyclops-community/tensor_decomposition

def svd_rand(A, r):
    return ctf.svd_rand(A, r)