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What is an intuitive explanation of the Expectation Maximization technique? [closed]
...(pk)]
multinomial_coeff_denom= 0
prod_probs = 0
for x in range(0,len(obs)): # loop through state counts in each observation
multinomial_coeff_denom = multinomial_coeff_denom + math.log(math.factorial(obs[x]))
prod_probs = prod_probs + obs[x]*math.log(probs[x])
...
hexadecimal string to byte array in python
...e binary data using something like:
data = "fef0babe"
bits = ""
for x in xrange(0, len(data), 2)
bits += chr(int(data[x:x+2], 16))
This is probably not the fastest way (many string appends), but quite simple using only core Python.
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Why does pthread_cond_wait have spurious wakeups?
...ng the predicate solves the problem. IMO, in general, users shouldn't use raw POSIX mutexes and conditionals.
– CubicleSoft
May 23 '16 at 9:40
1
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time.sleep — sleeps thread or process?
... import Thread
class worker(Thread):
def run(self):
for x in xrange(0,11):
print x
time.sleep(1)
class waiter(Thread):
def run(self):
for x in xrange(100,103):
print x
time.sleep(5)
def run():
worker().start()
waiter(...
Get a random boolean in python?
... timeit -s "from random import random" "test = [random() < 0.5 for i in range(1000000)]"
10 loops, best of 3: 118 msec per loop
$ python -m timeit -s "import numpy as np" "test = np.random.randint(2, size=1000000)"
100 loops, best of 3: 6.31 msec per loop
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Why is there an “Authorization Code” flow in OAuth2 when “Implicit” flow works so well?
...oken are useless when using a HTTPS and to be honest not so useful even on raw HTTP.
But the fact that client via implicit flow can’t receive the refresh token is also nonsense.
Thus I think we should introduce a new grant flow “safe implicit” which works strictly over https, allows refresh ...
What does %w(array) mean?
... (lowercase) %w, we have no code interpolation (#{someCode}) and a limited range of escape characters that work (\\, \n). With double quotes and (uppercase) %W we do have access to these features.
The delimiter used can be any character, not just the open parenthesis. Play with the examples above t...
What characters are allowed in DOM IDs? [duplicate]
...o-centric and accepting only ASCII letters. Those "gobbeldygook" character ranges like [#xF900-#xFDCF] represent useful Unicode characters that are allowed in a name, which your regex disallows.
– Phrogz
May 9 '16 at 15:48
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SQL Server: Get data for only the past year
...d to evaluate the year value of the date, it would be better to use a date range
– Adriaan Davel
May 30 '12 at 15:43
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How do I get the Git commit count?
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Ty. This worked for me when counting commits in a range; git shortlog sha1..sha2
– RJFalconer
Apr 13 '11 at 11:07
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