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Description
The Simulation command is used to create a data set where the true value of the State vector and the true statistics of the noise in the data are known. If you select the Sim button in the Command window the following dialog will appear:

Yes Simulate Data Noise
Errors
If an error occurs while processing the contents of the Simulation window, the error is reported relative to the line number in the file SIM.OMS in the temporary directory. If the error occurs while executing a Simulation command, the line number corresponds to the same line number in the Simulation window . If the error occurs while executing a Load command, this line number corresponds to the section of the Simulation record that is copied into the Simulation window.

Yes
If you select Yes, new simulated State vector values, s , and data values, z , are simulated and linked to the rest of KBF.

Simulate Data Noise
The simulation values for the State vector values are defined by the sim function in the Simulation window and are denoted by the variable s. If you do not check the Simulate Data Noise box, the simulated data values, z, are defined by
      z  = h (s )
       k    k  k
If you do check the Simulate Data Noise box, the simulated data values, z, are defined by
      z  = h (s ) + v
       k    k  k     k
The value v above is a normal random variable with mean zero and variance given by
                    / E[v(1) v(1)] ...  E[v(1) v(nz)] 
                    |    k    k            k    k     |
              T     |      .       .        .         |
   R = E[ v  v  ] = |      .       .        .         |
    k      k  k     |      .       .        .         |
                    |E[v(nz) v(1)] ... E[v(nz) v(nz)] |
                       k     k           k     k     /
where R is the Measurement variance which is specified in the Measurement window .

Example
If you load the EXAMPLE.KBF , you will notice that the State Plot and State Table windows are empty. If you then execute a Simulation command, the State Plot and State Table windows will look as follows: