Use vectorized functions in numpy

[cthoyt]

You can use vectorized operations in numpy to operate over entire arrays, then list unpack.

Also, remember that <- isn't a valid assingment in Python and the R people also finally decided to stop doing this too (it's only in legacy code or from legacy coders)

MEN2017/CausalR_Cubic1br.py

Lines 27 to 30 in 1f77631

	f_n_pp <- floor(twoByTwoContingencyTable[0]) #(floor in R/python --> largest integer value less than or equal to x)
	f_n_pm <- floor(twoByTwoContingencyTable[1])
	f_n_mp <- floor(twoByTwoContingencyTable[2])
	f_n_mm <- floor(twoByTwoContingencyTable[3])

f_n_pp,  f_n_pm, f_n_mp, f_n_mm = np.floor(twoByTwoContingencyTable[0:4])