butools.ph.APHFrom2Moments¶

butools.ph.APHFrom2Moments()¶

Matlab:	[alpha, A] = APHFrom2Moments(moms, maxSize)
Mathematica:	{alpha, A} = APHFrom2Moments[moms, maxSize]
Python/Numpy:	alpha, A = APHFrom2Moments(moms, maxSize)

Returns an acyclic PH which has the same 2 moments as given. If detects the order and the structure automatically to match the given moments.

Parameters:	moms : vector of doubles, length(2) The moments to match maxSize : int, optional The maximal size of the resulting APH. The default value is 100.
Returns:	alpha : vector, shape (1,M) The initial probability vector of the APH A : matrix, shape (M,M) Transient generator matrix of the APH Raises an error if the moments are not feasible with an APH of size “maxSize”.