t3toolbox.tucker_tensor_train.t3_save#

t3toolbox.tucker_tensor_train.t3_save(file, x: TuckerTensorTrain) → None#

Save a Tucker tensor train to a file.

Parameters:

  • file (str or file) – Either the filename (string) or an open file (file-like object) where the data will be saved. If file is a string or a Path, the .npz extension will be appended to the filename if it is not already there.

  • x (TuckerTensorTrain) – The Tucker tensor train to save

Raises:

  • ValueError – Error raised if the Tucker tensor train is inconsistent

  • RuntimeError – Error raised if the Tucker tensor train fails to save.

See also

TuckerTensorTrain, t3_load, check_t3

Examples

>>> import numpy as np
>>> import t3toolbox.tucker_tensor_train as t3
>>> x = t3.t3_corewise_randn((14,15,16), (4,5,6), (1,3,2,1))
>>> fname = 't3_file'
>>> t3.t3_save(fname, x) # Save to file 't3_file.npz'
>>> x2 = t3.t3_load(fname) # Load from file
>>> tucker_cores, tt_cores = x.data
>>> tucker_cores2, tt_cores2 = x2.data
>>> print([np.linalg.norm(B - B2) for B, B2 in zip(tucker_cores, tucker_cores2)])
[0.0, 0.0, 0.0]
>>> print([np.linalg.norm(G - G2) for G, G2 in zip(tt_cores, tt_cores2)])
[0.0, 0.0, 0.0]