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#!/usr/bin/python
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# 9.8
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import os, sys
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sys.path += [os.getcwdu() + os.sep + ".." + os.sep + "python"]
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import scipy as sp
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from polyfuncs import polmul
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from zpowk import zpowk
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from xdync import xdync
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def pp_pid(B, A, k, phi, Delta):
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Delta = sp.atleast_1d(Delta)
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B = sp.atleast_1d(B)
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# Setting up and solving Aryabhatta identity
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dA = len(A) - 1
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dB = len(B) - 1
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zk, dzk = zpowk(k)
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N, dN = polmul(B, dB, zk, dzk)
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dDelta = len(Delta)-1
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D, dD = polmul(A, dA, Delta, dDelta)
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dphi = len(phi)-1
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Sc, dSc, R, dR = xdync(N, dN, D, dD, phi, dphi)[:4]
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R = sp.squeeze(R)
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Rc = sp.convolve(R, Delta)
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return Rc, Sc
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if __name__ == "__main__":
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Ts = 1
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B = 0.63
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A = sp.array([1, -0.37])
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k = 1
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zk, dzk = zpowk(k)
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phi = sp.array([1, -0.5])
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delta = 1
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print pp_pid(B, A, k, phi, delta)
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