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19 April 2024, 10:50:53 UTC
Revision 1bb217a077d6fa1d507f963a60da81adfd099d79 authored by Jean Kossaifi on 14 July 2017, 03:03:33 UTC, committed by GitHub on 14 July 2017, 03:03:33 UTC 
Merge pull request #7 from chubei/master
 
Improving partial_svd by omitting full svd matrices when possible
2 parent s 3bb1250 + fd07894
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Tip revision: 1bb217a077d6fa1d507f963a60da81adfd099d79 authored by Jean Kossaifi on 14 July 2017, 03:03:33 UTC
Merge pull request #7 from chubei/master
Tip revision: 1bb217a
_norm.py 
import numpy as np

# Author: Jean Kossaifi

# License: BSD 3 clause



def norm(tensor, order):
    """Computes the l-`order` norm of tensor

    Parameters
    ----------
    tensor : ndarray
    order : int

    Returns
    -------
    float
        l-`order` norm of tensor
    """
    if order == 1:
        return np.sum(np.abs(tensor))
    elif order == 2:
        return np.sqrt(np.sum(tensor**2))
    else:
        return np.sum(np.abs(tensor)**order)**(1/order)
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