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control problem: lsim
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From: |
Rudolf Widmer-Schnidrig |
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Subject: |
control problem: lsim |
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Date: |
Sun, 24 Feb 2013 23:17:00 +0100 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:17.0) Gecko/20130216 Thunderbird/17.0.3 |
Dear Lukas, dear List,
What is the best way to evaluate the quality of a LTI model
which I have obtained like this
octave> dat = iddata(yout,xin); % yout is observed output to input xin
octave> sys = arx (dat,'NA',2,'NB',1')
From the control manual I expected that I could run
octave> lsim(sys,xin)
to predict the output for input xin given the system sys.
but I get the error: lsim: input vector u must have 2 columns
what am missing?
many thanks in advance, -Ruedi
--
+---------------------------------------------------------------+
Rudolf Widmer-Schnidrig
Black Forest Observatory (BFO)
Heubach 206
D-77709 Wolfach, Germany
e-mail: address@hidden
phone: +49 7836 2151
fax: +49 7836 955240
48d 19' 48.24" North 8d 19' 23.13" East
+---------------------------------------------------------------+
- control problem: lsim,
Rudolf Widmer-Schnidrig <=