\hypertarget{arx_ui}{}\subsection{Running experiment $\backslash$c estimator with ARX data fields}\label{arx_ui}
The experiment estimator::cpp can be run either on command line, or as a mex file in Matlab.\hypertarget{arx_ui_cmd}{}\section{Command-line usage}\label{arx_ui_cmd}
In order to use it for estimation of an ARX model, we can define the following \hyperlink{ui}{User Infos and their use} structure: 

\begin{DocInclude}\begin{verbatim}//Data generating system
system = {
        type = "ArxDS";
        y = {type="rv"; names=["y", "u"];};
        u = {type="rv"; names=[]; };
        rgr = {type="rv";
                names = ["y","y","y","u"];
                times = [-1, -2, -3, -1];
        };
        //AR parameters
        theta = [0.8, -0.3, 0.4, 1.0,
                 0.0, 0.0, 0.0, 0.0];
        // offset
        offset = [0.0, 0.0];
        //variance
        r = [0.1, 0.0,
             0.0, 1.0];
        // log also theta
        opt="L_theta";
};

//store results
logger = {
        type= "dirfilelog";
        dirname = "exp/arx_ui";
        maxlen = 1000; //
};

//estimation
estimator = {
        type = "ARXest";
        y = {type="rv"; names=["y"]; };
        rgr = {type="rv";
                names = ["y","y","y","u"];
                times = [-1, -2, -3, -1];
        };

        //optional fields
        dV0 = [1e-3, 1e-5, 1e-5, 1e-5, 1e-5]; //default: 1e-3 for y, 1e-5 for rgr
        nu0 = 8.;      //default: rgrlen + 2
        frg = 1.0;    // forgetting, default frg=1.0
};

//experiment description
experiment:{
        ndat = 9000;
};
\end{verbatim}
\end{DocInclude}
 \hypertarget{arx_ui}{}\subsection{Running experiment $\backslash$c estimator with ARX data fields}\label{arx_ui}
The experiment estimator::cpp can be run either on command line, or as a mex file in Matlab.\hypertarget{arx_ui_cmd}{}\section{Command-line usage}\label{arx_ui_cmd}
In order to use it for estimation of an ARX model, we can define the following \hyperlink{ui}{User Infos and their use} structure: 

\begin{DocInclude}\begin{verbatim}//Data generating system
system = {
        type = "ArxDS";
        y = {type="rv"; names=["y", "u"];};
        u = {type="rv"; names=[]; };
        rgr = {type="rv";
                names = ["y","y","y","u"];
                times = [-1, -2, -3, -1];
        };
        //AR parameters
        theta = [0.8, -0.3, 0.4, 1.0,
                 0.0, 0.0, 0.0, 0.0];
        // offset
        offset = [0.0, 0.0];
        //variance
        r = [0.1, 0.0,
             0.0, 1.0];
        // log also theta
        opt="L_theta";
};

//store results
logger = {
        type= "dirfilelog";
        dirname = "exp/arx_ui";
        maxlen = 1000; //
};

//estimation
estimator = {
        type = "ARXest";
        y = {type="rv"; names=["y"]; };
        rgr = {type="rv";
                names = ["y","y","y","u"];
                times = [-1, -2, -3, -1];
        };

        //optional fields
        dV0 = [1e-3, 1e-5, 1e-5, 1e-5, 1e-5]; //default: 1e-3 for y, 1e-5 for rgr
        nu0 = 8.;      //default: rgrlen + 2
        frg = 1.0;    // forgetting, default frg=1.0
};

//experiment description
experiment:{
        ndat = 9000;
};
\end{verbatim}
\end{DocInclude}