| author | Puneeth Chaganti <punchagan@fossee.in> |
| Fri, 27 May 2011 14:24:59 +0530 | |
| changeset 0 | 0efde00f9229 |
| permissions | -rw-r--r-- |
| 0 | 1 |
#!/usr/bin/python |
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# 11.7 |
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# N and D polynomials in z^{-1} form; discrete case
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import scipy as sp |
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from l2r import l2r |
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from scipy import signal |
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from covar_m import covar_m |
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def tfvar(N,dN,D,dD): |
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N,dN,D,dD = l2r(N,dN,D,dD) |
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N = N/D[0] |
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D = D/D[0] |
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LN, LD = len(N), len(D) |
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D1 = D |
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if LD<LN: |
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D1 = sp.hstack((D, sp.zeros(LN-LD))) |
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dD1 = dD+LN-LD |
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H = signal.lti(N, D1) |
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yvar = covar_m(H,1) |
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return N,dN,D,dD,yvar |