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Daniele Nicolodi <nicolodi@science.unitn.it> |
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Mon, 05 Dec 2011 16:20:06 +0100 (2011-12-05) |
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<h1 class="title"><a name="f3-12899" id="f3-12899"></a>Building Statespace models</h1>
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<H2>How to build a ssm object.
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<LI><P><FONT COLOR="#000000">The empty constructor creates an empty
statespace model</FONT></P>
<DIV CLASS="fragment"><PRE><FONT COLOR="#000000"><FONT FACE="Courier New, monospace"><FONT SIZE=2>>> </FONT></FONT></FONT>s = ssm()</PRE></DIV>
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<LI><P><FONT COLOR="#000000">Models can be built out of built-in
models (mfiles stored in a folder), out of a description with a
plist, from a repository or a xml file, but also out of a pzmodel, a
rational or a miir model. Conversion out of a parFrac object is not
implemented yet.</FONT></P>
<DIV CLASS="fragment"><PRE><FONT COLOR="#000000"><FONT FACE="Courier New, monospace"><FONT SIZE=2>>> </FONT></FONT></FONT>s = ssm(<pzmodel>)<BR><FONT COLOR="#000000"><FONT FACE="Courier New, monospace"><FONT SIZE=2>>> </FONT></FONT></FONT>s = ssm(<miir>)<BR><FONT COLOR="#000000"><FONT FACE="Courier New, monospace"><FONT SIZE=2>>> </FONT></FONT></FONT>s = ssm(<rational>)</PRE></DIV>
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<LI><P><FONT COLOR="#000000">This creates a new statespace model by
loading the object from disk, either out of an xml file or a .mat
file. The latter is not recommended as Matlab data format poses some
new retro-compatibility issues at each new release.</FONT></P>
<DIV CLASS="fragment"><PRE><FONT SIZE=2><FONT FACE="Courier New, monospace"><FONT COLOR="#000000">>> s = ssm(</FONT><FONT COLOR="#a020f0">'a1.xml'</FONT><FONT COLOR="#000000">)<BR></FONT></FONT></FONT><FONT COLOR="#000000"><FONT FACE="Courier New, monospace"><FONT SIZE=2>>> s = ssm(</FONT></FONT></FONT><FONT COLOR="#a020f0"><FONT FACE="Courier New, monospace"><FONT SIZE=2>'a1.mat'</FONT></FONT></FONT><FONT COLOR="#000000"><FONT FACE="Courier New, monospace"><FONT SIZE=2>)</FONT></FONT></FONT></PRE></DIV>
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<LI><P><FONT COLOR="#000000">For internal use (see built-in models),
a structure constructor is available. This is constructor should not
be used – except inside a built-in model – as it does
not increment history, making it impossible to rebuild the object.</FONT></P>
<DIV CLASS="fragment"><PRE><FONT COLOR="#000000"><FONT FACE="Courier New, monospace"><FONT SIZE=2>>> </FONT></FONT></FONT>s = ssm(<struct>)</PRE></DIV>
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<LI><P><FONT COLOR="#000000">There are dedicated help pages on how
to build a model out of a built-in object or a plist description.</FONT></P>
<DIV CLASS="fragment"><PRE><FONT COLOR="#000000">>> system = ssm(plist(<FONT COLOR="#a020f0">'built-in'</FONT>, <FONT COLOR="#a020f0">'<model name>'</FONT>))<BR></FONT><FONT COLOR="#000000">>> system = ssm(plist(</FONT><FONT COLOR="#a020f0">'built-in'</FONT><FONT COLOR="#000000">, </FONT><FONT COLOR="#000000"><model number>))</FONT>
>> system = ssm(plist(<FONT COLOR="#a020f0">'amats'</FONT>, <a matrices> ... ))</PRE></DIV>
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