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Topic: Singular value decomposition / Eigenanalysis
Replies: 1   Last Post: Jun 27, 1996 6:33 PM

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Barry Dunn

Posts: 3
Registered: 12/7/04
Singular value decomposition / Eigenanalysis
Posted: Jun 27, 1996 10:29 AM
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I have a state space system for which I have calculated
the controllability grammians. These matrices are in
general non diagonal. Ok now I want to calculate the
singular values of the grammian to determine the "influence"
of each state by comparing their relative values.

Ok the problem. Using the svd function in Matlab, returns
the singular values sorted in descending order. This is fine
for counting the number of non zero values to determine rank, but
I have no way of knowing which singular value corresponds
to which state due to the sorting. A similar problem
occurs with the eig function.

Any help or comments would be greatly appreciated.

Barry Dunn

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Vanderbilt University
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