/usr/lib/python2.7/dist-packages/mdp/test/test_ICANode.py is in python-mdp 3.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | from __future__ import division
from builtins import range
from past.utils import old_div
from ._tools import *
def verify_ICANode(icanode, rand_func = uniform, vars = 3, N=8000,
prec = 3):
dim = (N,vars)
mat,mix,inp = get_random_mix(rand_func=rand_func,mat_dim=dim)
icanode.train(inp)
act_mat = icanode.execute(inp)
cov = utils.cov2(old_div((mat-mean(mat,axis=0)),std(mat,axis=0)), act_mat)
maxima = numx.amax(abs(cov), axis=0)
assert_array_almost_equal(maxima,numx.ones(vars),prec)
def verify_ICANodeMatrices(icanode, rand_func = uniform, vars = 3, N=8000):
dim = (N,vars)
mat,mix,inp = get_random_mix(rand_func=rand_func,
mat_dim=dim, avg = 0)
icanode.train(inp)
# test projection matrix
act_mat = icanode.execute(inp)
T = icanode.get_projmatrix()
exp_mat = mult(inp, T)
assert_array_almost_equal(act_mat,exp_mat,6)
# test reconstruction matrix
out = act_mat.copy()
act_mat = icanode.inverse(out)
B = icanode.get_recmatrix()
exp_mat = mult(out, B)
assert_array_almost_equal(act_mat,exp_mat,6)
def rand_with_timestruct(size=None):
T, N = size
# do something special only if T!=N, otherwise
# we were asked to generate a mixing matrix
if T == N:
return uniform(size=size)
# create independent sources
src = uniform((T,N))*2-1
fsrc = numx_fft.rfft(src,axis=0)
# enforce different speeds
for i in range(N):
fsrc[(i+1)*(T//20):,i] = 0.
src = numx_fft.irfft(fsrc,axis=0)
return src
def test_CuBICANode_batch():
ica = mdp.nodes.CuBICANode(limit=10**(-decimal))
ica2 = ica.copy()
verify_ICANode(ica)
verify_ICANodeMatrices(ica2)
def test_CuBICANode_telescope():
ica = mdp.nodes.CuBICANode(limit=10**(-decimal), telescope=1)
ica2 = ica.copy()
verify_ICANode(ica)
verify_ICANodeMatrices(ica2)
def test_TDSEPNode():
ica = mdp.nodes.TDSEPNode(lags=20, limit=1e-10)
ica2 = ica.copy()
verify_ICANode(ica, rand_func=rand_with_timestruct, vars=2, N=2**14, prec=2)
verify_ICANodeMatrices(ica2, rand_func=rand_with_timestruct, vars=2, N=2**14)
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