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amkatrutsa/gist:321466696da1e358c250

Created March 24, 2015 20:32
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gistfile1.py
# First variant
term_1 = x
for k in xrange(2):
print "Num iteration", k
Wx = x
for i in xrange(k+1):
Wx = W.dot(Wx)
WTWx = Wx
for i in xrange(k+1):
WTWx = W.T.dot(WTWx)
term_1 = term_1 + WTWx
# Second variant
term_1 = scsp.csr_matrix((n,1))
for k in xrange(2):
print "Num iteration", k
Wx = x
for i in xrange(k):
Wx = W.dot(Wx)
WTWx = Wx
for i in xrange(k):
WTWx = W.T.dot(WTWx)
term_1 = term_1 + WTWx
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