bat.utils.proj_lp

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 1import numpy as np
 2
 3def proj_lp(v, xi=0.1, p=2):
 4    """
 5    Supports only p = 2 and p = Inf.
 6    """
 7    if p == 2:
 8        v = v * min(1, xi/np.linalg.norm(v.flatten('C')))
 9        # v = v / np.linalg.norm(v.flatten(1)) * xi
10    elif p == np.inf:
11        v = np.sign(v) * np.minimum(abs(v), xi)
12    else:
13        raise ValueError('Values of p different from 2 and Inf are currently not supported...')
14
15    return v

def proj_lp(v, xi=0.1, p=2): View Source

 4def proj_lp(v, xi=0.1, p=2):
 5    """
 6    Supports only p = 2 and p = Inf.
 7    """
 8    if p == 2:
 9        v = v * min(1, xi/np.linalg.norm(v.flatten('C')))
10        # v = v / np.linalg.norm(v.flatten(1)) * xi
11    elif p == np.inf:
12        v = np.sign(v) * np.minimum(abs(v), xi)
13    else:
14        raise ValueError('Values of p different from 2 and Inf are currently not supported...')
15
16    return v

Supports only p = 2 and p = Inf.